Abebe Chindi | Ethiopian Institute of Agricultural Research (original) (raw)
Papers by Abebe Chindi
Open Agriculture, Feb 1, 2017
constructed 8 diffused light stores. In addition to the demonstration of improved potato varietie... more constructed 8 diffused light stores. In addition to the demonstration of improved potato varieties, information dissemination was also an important component of the program to raise awareness for a large numbers of potato growers through farmers' field days, pamphlets, and mass media. Each year about three field days were organized and more than 1500 pamphlets were distributed to farmers invited from neighboring districts and 'Kebeles' to enhance speed. Through this intervention farmers are now harvesting a yield of about 26-34 t/ha up from 8t/ha when they were using inferior quality potato seed; this has made the farmers in the intervention area more food secure especially during the usually food scarce months of August to October when cereal crops are generally yet to mature. The farmers are also getting additional income from the sale of excess potato and are able to better meet other necessary costs like school fees, for their children.
Journal of development and agricultural economics, Aug 31, 2017
Increasing productivity through enhanced potato production efficiency could be an important move ... more Increasing productivity through enhanced potato production efficiency could be an important move towards food security. In Ethiopia potato (Solanum tubersum L.) production levels and rates have been increasing due to the development and dissemination of improved potato technologies. Despite these efforts by the government, smallholders' potato productivity has remained below potential. However, empirical studies conducted to estimate level of efficiencies and to identify its determining factors in potato production which would guide policy makers in their efforts to do up its productivity are sparse. The purpose of this study was to analyze the technical efficiency, yield loss due to inefficiency and factors affecting efficiency of rain-fed and irrigated potato farmers in Welmera district of Oromia region, Ethiopia. A two stage sampling procedure involving purposive and random selection of the district, kebeles and samples was used to collect data from 72 households (40 from rain-fed and 32 irrigated) using structured questionnaires during 2009/2010 cropping season. The stochastic frontier and translog functional form with a one-step approach were employed to analyze efficiency and factors affecting efficiency in potato production. The maximum likelihood estimates for the inefficiency parameter showed that both most rain-fed and irrigated potato farmers in the study area were not efficient. The mean technical efficiency (TE) was found to be 81 and 68%, and about 4057 and 6185 kg of potato tubers per hectare were lost due to inefficiency factors for and/or from rain-fed and irrigated potato farmers, respectively. Variables such as education, soil condition and seed tuber size affected TE of both rain-fed and irrigated potato farmers, while age of the household head affected irrigated potato farmers' TE positively and significantly indicating that experience through age matters in irrigated potato production. The finding implies that there is an opportunity to improve technical efficiency among the rain-fed and irrigated potato farmers by 19 and 32%, respectively. Improving potato productivity needs owing cares of technical efficiency and farm and household socioeconomic characteristics that influenced technical efficiency in smallholder potato production. Train producers to use appropriate seed tuber size and maintain their soil fertility condition by extension and increase the educational level of the household heads through appropriate literacy.
Asian Journal of Plant Pathology, Apr 15, 2013
International Journal of Plant, Physiology and Biochemistry, Jan 31, 2020
Potato, an important food and nutrition security can be produced two or more times in a year in E... more Potato, an important food and nutrition security can be produced two or more times in a year in Ethiopia. It plays an important role in human diet and a source of income for smallholder farmers. However, its productivity is low owing to limited availability of planting materials and poor tuber sprouting of improved varieties. Lack of quality seed is a major problem affecting expansion of potato production. The objective of the study is to determine effects of different methods and rates of Gibberellic acid (GA 3) application on dormancy of potato variety, Gera cultivar. The experiment was conducted at Holetta Agricultural Research Center during 2008 to 2009. It consisted of five levels of GA 3 as haulm application, a week prior to destruction and five levels of GA 3 as a dipping treatment immediately after harvest for 24 h. Randomized Complete Block Design with three replications was used. Result revealed GA 3 application affects dormancy and sprouting. Haulm application of GA 3 at 750 and 1000 ppm reduced dormancy period by 24 to 27 days, respectively. Dipping treatments of 40 and 50 ppm reduced dormancy period by 18 to 20 days, respectively. The study indicated that haulm application of GA 3 at 750 or 1000 ppm and dipping treatments of 40 or 50 ppm resulted in early dormancy termination, shoot emergence and increased sprout.
Agriculture and food sciences research, 2019
In most developing countries potatoes are consumed in fresh with some processing into chips and c... more In most developing countries potatoes are consumed in fresh with some processing into chips and crisps. In Ethiopia there are only three type of potato processed products such as boiled or cooked product, wot and deep fried types. Principally, farmers in Ethiopia produce potato for fresh marketing and tubers seed sale. To diversify potato utilization, training on potato processing was held in two kebeles of Welmera and one kebele's of Ada Berga District for selected potato producing farmers group and cooperative members to promote potato processing and increase farmer's attitude towards potato production as well as to diversify the use of potato product and foods farmers use. The recipes done were Potato Pasta, Potato Kinche, Potato quanta, Potato starch, Potato crisp and chips, Genfo, Shiro wot, Chechebsa, Enjera, bread, Firfir (from mixture of meat and egg). These food types were found food which have good look, nutritious and pleasant. Use of potato in different food items raise the appetite of people and diversify food farmers' use. Farmers appreciated the food types prepared from potato. They recommended processing and promoting it through mass media (TV), radio and exhibition in town administration. In addition, the farmers appreciated the effort Holetta Research Center puts in providing new seed tubers together with its technology to producers and they asked to get continues support in the future time.
Asian Journal of Crop Science, Jun 15, 2014
Greener Journal of Agricultural Sciences, 2017
The use of low phosphorus fertilize rate as well as inappropriate plant spacing are one of the ma... more The use of low phosphorus fertilize rate as well as inappropriate plant spacing are one of the main factors constraining potato production in Ethiopia. Therefore, a field experiment was conducted during the 2015 and 2016 main growing season in Welmera and Ada'a Berga district in the central highland of Ethiopia. The experiment was aimed at determining the effect of phosphorus fertilizer rates and plant spacing on yield and yield components of potato. The treatments consisted of five phosphorus fertilizer rate and four levels of plant spacing (65 cm x 30 cm, 75 cm x 30 cm, 85 cm x 30 cm and 95 cm x 30 cm). The experiment was laid out as a randomized complete block design in a factorial arrangement and replicated three times. Analysis of the results revealed that phosphorus fertilizer and plant spacing significantly affected leaf area index, marketable tuber number, total tuber numbers, total yields, specific gravity and tuber dry matter. However, days to follower and days to maturity significantly affected by phosphorus fertilizer but did not affect by plant spacing. Increasing or widening plant spacing significantly reduced total as well as unmarketable tuber yields whereas decreasing or narrowing it significantly increased this yield parameter. On the other hand, increasing plant spacing significantly increased marketable tuber yields. In conclusion, the phosphorus fertilizer and plant spacing produced the highest tuber yields (ton ha-1) as well as marketable tuber yield in response to planting at phosphorus fertilizer in the form of P2O5 115kg ha-1 and spacing of 85 cm between rows and 30 cm between plants for Belete variety was advisably.
Plants
Malnutrition is one of the global issues of public health concern, and iron and zinc deficiencies... more Malnutrition is one of the global issues of public health concern, and iron and zinc deficiencies are at the top of the list. Iron deficiency affects more than 2 billion people in the world and is a major cause of anemia. Potato has the potential to be an important source of iron and zinc. This study assessed the nature and magnitude of genetic variability in Fe and Zn concentrations, tuber yield, and quality traits among biofortified tetraploid potato clones and their relationships through correlation and path analysis. A total of 45 potato genotypes, including the variety Gudanie, were grown in field trials in a 9 × 5 alpha lattice design with three replications. Significant differences in mineral, tuber quality, and yield traits were observed among the genotypes, and high broad-sense heritability was obtained for most traits, suggesting that progress through breeding can be achieved. However, negative correlations and direct effects on most of the traits with Fe and Zn contents a...
Open Agriculture, Feb 1, 2017
length was significantly affected by nutrient solutions. Nutrient solution C resulted the maximum... more length was significantly affected by nutrient solutions. Nutrient solution C resulted the maximum root length (300.8 cm), while nutrient solution A produced minimum root length (135.5 cm). Plant height was not significantly affected by nutrient solutions. Small size tubers (<8 g) were not significantly affected by either tuber number or weight. Medium (8-12 g) and large size tubers (>12 g) were significantly affected by nutrient solutions both in number and weight. The maximum tuber numbers was obtained from treatment B. Therefore, the experiment indicated that treatment B represents the optimum nutrient concentration rate to use in an aeroponics minituber production system under Holetta conditions.
International Journal of Agricultural Extension, 2020
Utilization of healthy planting material is a key factor to improve potato yields to reduce the d... more Utilization of healthy planting material is a key factor to improve potato yields to reduce the dissemination of diseases and pests. Quality seed is one of the major bottlenecks hindering the production and productivity of potato in major potato growing regions of the country. Therefore, participatory on-farm seed production and improved potato technologies promotion have been carried out during the year 2014-2016 at five districts, Jeldu, Dendi, Wolmera Degem and Kersana Malima of central Ethiopia. To produce quality potato seed various rapid multiplication techniques were used. Thus, improved potato technologies were demonstrated using different methodologies such as the farmers’ field schools, the farmers' research group and field days. To supply clean tubers about 138,886 high-quality mini-tubers of improved varieties of Belete, Gudanie, Jalenie and Awash were produced. Moreover, a total of 257.08 tons of seed tubers of 15 released potato varieties were produced and dissemin...
International Journal of Plant Physiology and Biochemistry, 2020
Potato, an important food and nutrition security can be produced two or more times in a year in E... more Potato, an important food and nutrition security can be produced two or more times in a year in Ethiopia. It plays an important role in human diet and a source of income for smallholder farmers. However, its productivity is low owing to limited availability of planting materials and poor tuber sprouting of improved varieties. Lack of quality seed is a major problem affecting expansion of potato production. The objective of the study is to determine effects of different methods and rates of Gibberellic acid (GA 3) application on dormancy of potato variety, Gera cultivar. The experiment was conducted at Holetta Agricultural Research Center during 2008 to 2009. It consisted of five levels of GA 3 as haulm application, a week prior to destruction and five levels of GA 3 as a dipping treatment immediately after harvest for 24 h. Randomized Complete Block Design with three replications was used. Result revealed GA 3 application affects dormancy and sprouting. Haulm application of GA 3 at 750 and 1000 ppm reduced dormancy period by 24 to 27 days, respectively. Dipping treatments of 40 and 50 ppm reduced dormancy period by 18 to 20 days, respectively. The study indicated that haulm application of GA 3 at 750 or 1000 ppm and dipping treatments of 40 or 50 ppm resulted in early dormancy termination, shoot emergence and increased sprout.
Global Journal of Agricultural Innovation, Research & Development, 2020
The productivity of potato is low owing to a number of constraints including poor sprouting due ... more The productivity of potato is low owing to a number of constraints including poor sprouting due to dormancy, which leads to delayed planting and poor crop emergence and vigor. The study was conducted during 2008-2009 with the objectives to determine the effects of different methods and rates of gibberellic acid (GA3) application on dormancy attributes, tuber yield and quality of potato, and its subsequent generation of Gera cultivar. Five levels of GA3 (0, 250,500,750 and 1000 ppm), as haulm application a week prior to haulm destruction, and five levels of GA3 (10, 20, 30, 40 and 50 ppm), as dipping treatments immediately after harvest for 24hrs, were used as treatments. The treatments were arranged in randomized completed block design with three replications both for planting and storage. The result showed that GA3 application affected dormancy period, tuber yield and quality. Haulm applications of GA3 increased marketable tuber and tuber yield per hill as compared to untreated tu...
Journal of Natural Sciences Research, 2019
Agronomic practices like fertilizer application and low soil pH which associated with soil infert... more Agronomic practices like fertilizer application and low soil pH which associated with soil infertility problems are considered to be among the major challenges to potato production in the highlands of Ethiopia. In response to this, an experiment was conducted to compare effect of different sources of fertilizes on potato yield and yield components from 2015-2016 main cropping season(June-August) in four districts of west and south west part of Ethiopia comprising two potato varieties Belete and Gudenie as main plot and five fertilizer source treatments as sub plot. These fertilizer source treatments were control, recommended Urea (165 kg/ha) and DAP (195 kg/ha), recommended Urea (165 kg/ha) and DAP (195 kg/ha) plus 225 kg/ha potassium sulfate (K2SO4), recommended Urea (165 kg/ha) and DAP (195 kg/ha) plus 225 kg/ha potassium chloride (KCl) and 242 kg/ha blended mineral fertilizer NPSB with N=18.9%, P=37.7%, S=6.95%, B=0.1% content plus 141 kg/ha urea under both limed and unlimmed soil conditions. The design was split plot with three replications. The data were analyzed using SAS soft ware versions 9.2. The experiment results showed that interaction of location and fertilizer types was highly significant in affecting total tuber and marketable tuber weight in t/ha. The Blended NPSB fertilizer was found superior in Welmera and Gumer location producing maximum total tuber yield of 33.21t/ha and 22.93t/ha respectively, under unlimmed soil condition while recommended urea and DAP provided maximum total tuber yield 31.38t/ha and 24.06t/ha under limed soil condition, respectively. In Jeldu growing location, the recommended urea and DAP plus KCl was produced maximum total tuber yield (19.13 t/ha under Unlimmed; and 23.9 t/ha total tuber yield under limed soil condition). In wenchi, the recommended urea and DAP was produced maximum 25.66 and 30.99 t/ha total tuber yield under both un-limed and limed soil condition, respectively. Interaction of growing year and location was highly significant in influencing average tuber number (total tuber number/plant) and average tuber weight (total tuber weight/tuber number). Interaction of location and growing year was highly significant in influencing dry matter under un-limed and limed soil condition. From these results, it can be concluded that the growing location and fertilizer sources had significantly affected the yield and yield component of potato both under limed and unlimmed soil conditions.
Journal of Biology, Agriculture and Healthcare, 2017
Quality seed is one of the basic problems affecting the production and productivity of potato in ... more Quality seed is one of the basic problems affecting the production and productivity of potato in Ethiopia and as whole in SSA. Utilization of healthy planting material is a key factor to improve potato yields and to reduce the dissemination of pests and diseases. Decentralized, community-based seed production schemes have been established in central highlands of Ethiopia. Lack of high yielding varieties with its recommended agronomic practices also contribute significant role in food security of one country. Postharvest handling and transportation also can put considerable influence on potato production and utilizations. Therefore, technology promotions were carried out from 2013 - 2015 in three districts (Welmera, Adea-Bera and Ejere) of West shewa of Ethiopia with the objectives of creating awareness and scale-up of improved potato production and utilization technologies. This work was done by the Potato Improvement Research Program, and Research and Extension Division of Holetta ...
Received: 21 December 2020 Revised received: 01 March 2021 Accepted: 15 March 2021 This experimen... more Received: 21 December 2020 Revised received: 01 March 2021 Accepted: 15 March 2021 This experiment was conducted to determine the rate of blended fertilizers and urea for potato production under rainfed condition in Jeldu, West Showa, Ethiopia. Different fertilizer treatments viz., 150 kg ha NPSB+80 kg ha urea, 250 kg ha NPSB+80 kg ha urea, 350 kg ha NPSB+80 kg ha urea, 150 kg ha NPSB+140 kg ha urea, 250 kg ha NPSB+140 kg ha urea, 350 kg ha NPSB+140 kg ha urea, 150 kg ha NPSB +200 kg ha urea, 250 kg ha NPSB +200 kg ha urea and 350 kg ha N+200 kg ha urea was used for the production of Belete and Gudenie potato varieties (cv. Jeldu Wereda) during 2018-2019 using RCBD factorial arrangement in three replication. This study revealed that there was a highly significant difference between the yield and yield components of potato due to the main effect of fertilizer rates. The interaction did not significantly affect any parameter of potato during the study. The highest total and marketable...
An experiment was conducted on a Nitisol of Holetta agricultural research and Jeldu Sub-center u... more An experiment was conducted on a Nitisol of Holetta agricultural research and Jeldu Sub-center using three factors such as potato varieties (Belete, Jalenie and Gudanie), nitrogen rates (87, 110 and 133 kg/ha) and potassium oxide rates (0, 34.5, 69 and 103 kg/ha) that were arranged on randomized complete block design with three replications. The data were subjected to Proc GLM model of SAS software version 9.2. Higher tuber nitrogen content, uptake and utilization was obtained from Holetta location than Jeldu. Increasing nitrogen fertilizer from 87 to 133 kg/ha reduced the tuber nitrogen uptake and utilization efficiency by 75.56 and 75.49%, respectively. The interaction between variety and location also highly significantly affected tuber nitrogen content and nitrogen utilization efficiency. The interaction between nitrogen and variety affected tuber nitrogen in percent and protein content highly significantly. The highest tuber nitrogen and protein content was obtained from Belet...
International Journal of Horticulture, Agriculture and Food science, 2021
International Journal of Horticulture, Agriculture and Food science, 2021
One argument for early intervention for reading difficulties is that it can sustainably improve c... more One argument for early intervention for reading difficulties is that it can sustainably improve children's reading competence trajectory (the 'inoculation model'), but there are virtually no studies on sustained effects at the end of compulsory schooling. This study reports on a 10-year follow-up of a widely used early literacy intervention, Reading Recovery. UK schools adopting Reading Recovery enrol selected teachers for a year's training, after which they provide one-to-one tutoring and typically act as literacy advisors. In a quasi-experimental, intention to treat, design, 293 6-year-olds with reading difficulties in 42 London schools were assigned to Reading Recovery (RR), standard provision in Reading Recovery schools (RRS) or standard provision in comparison schools (CS). Children were traced at ages 14 (204) and 16 (271) and data collected from the National Pupil Database. At age 14 and 16, significantly fewer RR than CS pupils were officially identified as having special educational needs, a potential consequence of reading difficulties. Using multi-level modelling and controlling for baseline reading and Free School Meal status (an indicator of poverty), at age 16 the RR group significantly outperformed the CS group on academic qualifications (GCSEs) (d = 0.52). However, the RRS group also performed significantly better than the CS group (d = 0.37), consistent with the fact that standard provision for weaker readers in RR schools differed from that provided in CS. Thus, these results support the long-term effects of early intervention but raise questions about the importance of whole-school effects and systemic intervention.
Advances in Crop Science and Technology, 2016
Field experiment was conducted at Holetta and Jeldu Agricultural Research Station in the central ... more Field experiment was conducted at Holetta and Jeldu Agricultural Research Station in the central highlands of Ethiopia to determine the rates of Nitrogen (N) and Potassium (K) fertilizers on growth, yield and yield components of potato. 4 × 32 factorial treatment was arranged in completely randomized block design with three replications on plot size of 3 m × 3 m during 2014-2015 cropping season. Nitrogen (87 kg, 110 kg and 133 kg/ha), Potassium (0, 34.5 kg, 69 kg and 103.5 kg/ha) and potato varieties (Betete, Gudenie and Jalenie) were used. Data were analyzed by using SAS software Version 9.2. The interaction effect of potassium and nitrogen fertilizers did affect marketable tuber number and plant height significantly. Gudenie produced the highest marketable yield (30.53 ton/ha) in 2015 with application of 69 kg/ha potassium and 110 kg/ha nitrogen rates while lowest marketable yield (16.67 ton/ha) was obtained from Belete variety at 0 kg/ha potassium rate and 87 kg/ha nitrogen rate. From these results, it can be concluded that interaction of nitrogen and potassium rates affected significantly plant height and marketable tuber numbers. Therefore, it is better to apply 69 kg/ha potassium and 110 kg/ha nitrogen for potato production to obtain reasonable economic yield at sites similar to experimental locations.
Open Agriculture, Feb 1, 2017
constructed 8 diffused light stores. In addition to the demonstration of improved potato varietie... more constructed 8 diffused light stores. In addition to the demonstration of improved potato varieties, information dissemination was also an important component of the program to raise awareness for a large numbers of potato growers through farmers' field days, pamphlets, and mass media. Each year about three field days were organized and more than 1500 pamphlets were distributed to farmers invited from neighboring districts and 'Kebeles' to enhance speed. Through this intervention farmers are now harvesting a yield of about 26-34 t/ha up from 8t/ha when they were using inferior quality potato seed; this has made the farmers in the intervention area more food secure especially during the usually food scarce months of August to October when cereal crops are generally yet to mature. The farmers are also getting additional income from the sale of excess potato and are able to better meet other necessary costs like school fees, for their children.
Journal of development and agricultural economics, Aug 31, 2017
Increasing productivity through enhanced potato production efficiency could be an important move ... more Increasing productivity through enhanced potato production efficiency could be an important move towards food security. In Ethiopia potato (Solanum tubersum L.) production levels and rates have been increasing due to the development and dissemination of improved potato technologies. Despite these efforts by the government, smallholders' potato productivity has remained below potential. However, empirical studies conducted to estimate level of efficiencies and to identify its determining factors in potato production which would guide policy makers in their efforts to do up its productivity are sparse. The purpose of this study was to analyze the technical efficiency, yield loss due to inefficiency and factors affecting efficiency of rain-fed and irrigated potato farmers in Welmera district of Oromia region, Ethiopia. A two stage sampling procedure involving purposive and random selection of the district, kebeles and samples was used to collect data from 72 households (40 from rain-fed and 32 irrigated) using structured questionnaires during 2009/2010 cropping season. The stochastic frontier and translog functional form with a one-step approach were employed to analyze efficiency and factors affecting efficiency in potato production. The maximum likelihood estimates for the inefficiency parameter showed that both most rain-fed and irrigated potato farmers in the study area were not efficient. The mean technical efficiency (TE) was found to be 81 and 68%, and about 4057 and 6185 kg of potato tubers per hectare were lost due to inefficiency factors for and/or from rain-fed and irrigated potato farmers, respectively. Variables such as education, soil condition and seed tuber size affected TE of both rain-fed and irrigated potato farmers, while age of the household head affected irrigated potato farmers' TE positively and significantly indicating that experience through age matters in irrigated potato production. The finding implies that there is an opportunity to improve technical efficiency among the rain-fed and irrigated potato farmers by 19 and 32%, respectively. Improving potato productivity needs owing cares of technical efficiency and farm and household socioeconomic characteristics that influenced technical efficiency in smallholder potato production. Train producers to use appropriate seed tuber size and maintain their soil fertility condition by extension and increase the educational level of the household heads through appropriate literacy.
Asian Journal of Plant Pathology, Apr 15, 2013
International Journal of Plant, Physiology and Biochemistry, Jan 31, 2020
Potato, an important food and nutrition security can be produced two or more times in a year in E... more Potato, an important food and nutrition security can be produced two or more times in a year in Ethiopia. It plays an important role in human diet and a source of income for smallholder farmers. However, its productivity is low owing to limited availability of planting materials and poor tuber sprouting of improved varieties. Lack of quality seed is a major problem affecting expansion of potato production. The objective of the study is to determine effects of different methods and rates of Gibberellic acid (GA 3) application on dormancy of potato variety, Gera cultivar. The experiment was conducted at Holetta Agricultural Research Center during 2008 to 2009. It consisted of five levels of GA 3 as haulm application, a week prior to destruction and five levels of GA 3 as a dipping treatment immediately after harvest for 24 h. Randomized Complete Block Design with three replications was used. Result revealed GA 3 application affects dormancy and sprouting. Haulm application of GA 3 at 750 and 1000 ppm reduced dormancy period by 24 to 27 days, respectively. Dipping treatments of 40 and 50 ppm reduced dormancy period by 18 to 20 days, respectively. The study indicated that haulm application of GA 3 at 750 or 1000 ppm and dipping treatments of 40 or 50 ppm resulted in early dormancy termination, shoot emergence and increased sprout.
Agriculture and food sciences research, 2019
In most developing countries potatoes are consumed in fresh with some processing into chips and c... more In most developing countries potatoes are consumed in fresh with some processing into chips and crisps. In Ethiopia there are only three type of potato processed products such as boiled or cooked product, wot and deep fried types. Principally, farmers in Ethiopia produce potato for fresh marketing and tubers seed sale. To diversify potato utilization, training on potato processing was held in two kebeles of Welmera and one kebele's of Ada Berga District for selected potato producing farmers group and cooperative members to promote potato processing and increase farmer's attitude towards potato production as well as to diversify the use of potato product and foods farmers use. The recipes done were Potato Pasta, Potato Kinche, Potato quanta, Potato starch, Potato crisp and chips, Genfo, Shiro wot, Chechebsa, Enjera, bread, Firfir (from mixture of meat and egg). These food types were found food which have good look, nutritious and pleasant. Use of potato in different food items raise the appetite of people and diversify food farmers' use. Farmers appreciated the food types prepared from potato. They recommended processing and promoting it through mass media (TV), radio and exhibition in town administration. In addition, the farmers appreciated the effort Holetta Research Center puts in providing new seed tubers together with its technology to producers and they asked to get continues support in the future time.
Asian Journal of Crop Science, Jun 15, 2014
Greener Journal of Agricultural Sciences, 2017
The use of low phosphorus fertilize rate as well as inappropriate plant spacing are one of the ma... more The use of low phosphorus fertilize rate as well as inappropriate plant spacing are one of the main factors constraining potato production in Ethiopia. Therefore, a field experiment was conducted during the 2015 and 2016 main growing season in Welmera and Ada'a Berga district in the central highland of Ethiopia. The experiment was aimed at determining the effect of phosphorus fertilizer rates and plant spacing on yield and yield components of potato. The treatments consisted of five phosphorus fertilizer rate and four levels of plant spacing (65 cm x 30 cm, 75 cm x 30 cm, 85 cm x 30 cm and 95 cm x 30 cm). The experiment was laid out as a randomized complete block design in a factorial arrangement and replicated three times. Analysis of the results revealed that phosphorus fertilizer and plant spacing significantly affected leaf area index, marketable tuber number, total tuber numbers, total yields, specific gravity and tuber dry matter. However, days to follower and days to maturity significantly affected by phosphorus fertilizer but did not affect by plant spacing. Increasing or widening plant spacing significantly reduced total as well as unmarketable tuber yields whereas decreasing or narrowing it significantly increased this yield parameter. On the other hand, increasing plant spacing significantly increased marketable tuber yields. In conclusion, the phosphorus fertilizer and plant spacing produced the highest tuber yields (ton ha-1) as well as marketable tuber yield in response to planting at phosphorus fertilizer in the form of P2O5 115kg ha-1 and spacing of 85 cm between rows and 30 cm between plants for Belete variety was advisably.
Plants
Malnutrition is one of the global issues of public health concern, and iron and zinc deficiencies... more Malnutrition is one of the global issues of public health concern, and iron and zinc deficiencies are at the top of the list. Iron deficiency affects more than 2 billion people in the world and is a major cause of anemia. Potato has the potential to be an important source of iron and zinc. This study assessed the nature and magnitude of genetic variability in Fe and Zn concentrations, tuber yield, and quality traits among biofortified tetraploid potato clones and their relationships through correlation and path analysis. A total of 45 potato genotypes, including the variety Gudanie, were grown in field trials in a 9 × 5 alpha lattice design with three replications. Significant differences in mineral, tuber quality, and yield traits were observed among the genotypes, and high broad-sense heritability was obtained for most traits, suggesting that progress through breeding can be achieved. However, negative correlations and direct effects on most of the traits with Fe and Zn contents a...
Open Agriculture, Feb 1, 2017
length was significantly affected by nutrient solutions. Nutrient solution C resulted the maximum... more length was significantly affected by nutrient solutions. Nutrient solution C resulted the maximum root length (300.8 cm), while nutrient solution A produced minimum root length (135.5 cm). Plant height was not significantly affected by nutrient solutions. Small size tubers (<8 g) were not significantly affected by either tuber number or weight. Medium (8-12 g) and large size tubers (>12 g) were significantly affected by nutrient solutions both in number and weight. The maximum tuber numbers was obtained from treatment B. Therefore, the experiment indicated that treatment B represents the optimum nutrient concentration rate to use in an aeroponics minituber production system under Holetta conditions.
International Journal of Agricultural Extension, 2020
Utilization of healthy planting material is a key factor to improve potato yields to reduce the d... more Utilization of healthy planting material is a key factor to improve potato yields to reduce the dissemination of diseases and pests. Quality seed is one of the major bottlenecks hindering the production and productivity of potato in major potato growing regions of the country. Therefore, participatory on-farm seed production and improved potato technologies promotion have been carried out during the year 2014-2016 at five districts, Jeldu, Dendi, Wolmera Degem and Kersana Malima of central Ethiopia. To produce quality potato seed various rapid multiplication techniques were used. Thus, improved potato technologies were demonstrated using different methodologies such as the farmers’ field schools, the farmers' research group and field days. To supply clean tubers about 138,886 high-quality mini-tubers of improved varieties of Belete, Gudanie, Jalenie and Awash were produced. Moreover, a total of 257.08 tons of seed tubers of 15 released potato varieties were produced and dissemin...
International Journal of Plant Physiology and Biochemistry, 2020
Potato, an important food and nutrition security can be produced two or more times in a year in E... more Potato, an important food and nutrition security can be produced two or more times in a year in Ethiopia. It plays an important role in human diet and a source of income for smallholder farmers. However, its productivity is low owing to limited availability of planting materials and poor tuber sprouting of improved varieties. Lack of quality seed is a major problem affecting expansion of potato production. The objective of the study is to determine effects of different methods and rates of Gibberellic acid (GA 3) application on dormancy of potato variety, Gera cultivar. The experiment was conducted at Holetta Agricultural Research Center during 2008 to 2009. It consisted of five levels of GA 3 as haulm application, a week prior to destruction and five levels of GA 3 as a dipping treatment immediately after harvest for 24 h. Randomized Complete Block Design with three replications was used. Result revealed GA 3 application affects dormancy and sprouting. Haulm application of GA 3 at 750 and 1000 ppm reduced dormancy period by 24 to 27 days, respectively. Dipping treatments of 40 and 50 ppm reduced dormancy period by 18 to 20 days, respectively. The study indicated that haulm application of GA 3 at 750 or 1000 ppm and dipping treatments of 40 or 50 ppm resulted in early dormancy termination, shoot emergence and increased sprout.
Global Journal of Agricultural Innovation, Research & Development, 2020
The productivity of potato is low owing to a number of constraints including poor sprouting due ... more The productivity of potato is low owing to a number of constraints including poor sprouting due to dormancy, which leads to delayed planting and poor crop emergence and vigor. The study was conducted during 2008-2009 with the objectives to determine the effects of different methods and rates of gibberellic acid (GA3) application on dormancy attributes, tuber yield and quality of potato, and its subsequent generation of Gera cultivar. Five levels of GA3 (0, 250,500,750 and 1000 ppm), as haulm application a week prior to haulm destruction, and five levels of GA3 (10, 20, 30, 40 and 50 ppm), as dipping treatments immediately after harvest for 24hrs, were used as treatments. The treatments were arranged in randomized completed block design with three replications both for planting and storage. The result showed that GA3 application affected dormancy period, tuber yield and quality. Haulm applications of GA3 increased marketable tuber and tuber yield per hill as compared to untreated tu...
Journal of Natural Sciences Research, 2019
Agronomic practices like fertilizer application and low soil pH which associated with soil infert... more Agronomic practices like fertilizer application and low soil pH which associated with soil infertility problems are considered to be among the major challenges to potato production in the highlands of Ethiopia. In response to this, an experiment was conducted to compare effect of different sources of fertilizes on potato yield and yield components from 2015-2016 main cropping season(June-August) in four districts of west and south west part of Ethiopia comprising two potato varieties Belete and Gudenie as main plot and five fertilizer source treatments as sub plot. These fertilizer source treatments were control, recommended Urea (165 kg/ha) and DAP (195 kg/ha), recommended Urea (165 kg/ha) and DAP (195 kg/ha) plus 225 kg/ha potassium sulfate (K2SO4), recommended Urea (165 kg/ha) and DAP (195 kg/ha) plus 225 kg/ha potassium chloride (KCl) and 242 kg/ha blended mineral fertilizer NPSB with N=18.9%, P=37.7%, S=6.95%, B=0.1% content plus 141 kg/ha urea under both limed and unlimmed soil conditions. The design was split plot with three replications. The data were analyzed using SAS soft ware versions 9.2. The experiment results showed that interaction of location and fertilizer types was highly significant in affecting total tuber and marketable tuber weight in t/ha. The Blended NPSB fertilizer was found superior in Welmera and Gumer location producing maximum total tuber yield of 33.21t/ha and 22.93t/ha respectively, under unlimmed soil condition while recommended urea and DAP provided maximum total tuber yield 31.38t/ha and 24.06t/ha under limed soil condition, respectively. In Jeldu growing location, the recommended urea and DAP plus KCl was produced maximum total tuber yield (19.13 t/ha under Unlimmed; and 23.9 t/ha total tuber yield under limed soil condition). In wenchi, the recommended urea and DAP was produced maximum 25.66 and 30.99 t/ha total tuber yield under both un-limed and limed soil condition, respectively. Interaction of growing year and location was highly significant in influencing average tuber number (total tuber number/plant) and average tuber weight (total tuber weight/tuber number). Interaction of location and growing year was highly significant in influencing dry matter under un-limed and limed soil condition. From these results, it can be concluded that the growing location and fertilizer sources had significantly affected the yield and yield component of potato both under limed and unlimmed soil conditions.
Journal of Biology, Agriculture and Healthcare, 2017
Quality seed is one of the basic problems affecting the production and productivity of potato in ... more Quality seed is one of the basic problems affecting the production and productivity of potato in Ethiopia and as whole in SSA. Utilization of healthy planting material is a key factor to improve potato yields and to reduce the dissemination of pests and diseases. Decentralized, community-based seed production schemes have been established in central highlands of Ethiopia. Lack of high yielding varieties with its recommended agronomic practices also contribute significant role in food security of one country. Postharvest handling and transportation also can put considerable influence on potato production and utilizations. Therefore, technology promotions were carried out from 2013 - 2015 in three districts (Welmera, Adea-Bera and Ejere) of West shewa of Ethiopia with the objectives of creating awareness and scale-up of improved potato production and utilization technologies. This work was done by the Potato Improvement Research Program, and Research and Extension Division of Holetta ...
Received: 21 December 2020 Revised received: 01 March 2021 Accepted: 15 March 2021 This experimen... more Received: 21 December 2020 Revised received: 01 March 2021 Accepted: 15 March 2021 This experiment was conducted to determine the rate of blended fertilizers and urea for potato production under rainfed condition in Jeldu, West Showa, Ethiopia. Different fertilizer treatments viz., 150 kg ha NPSB+80 kg ha urea, 250 kg ha NPSB+80 kg ha urea, 350 kg ha NPSB+80 kg ha urea, 150 kg ha NPSB+140 kg ha urea, 250 kg ha NPSB+140 kg ha urea, 350 kg ha NPSB+140 kg ha urea, 150 kg ha NPSB +200 kg ha urea, 250 kg ha NPSB +200 kg ha urea and 350 kg ha N+200 kg ha urea was used for the production of Belete and Gudenie potato varieties (cv. Jeldu Wereda) during 2018-2019 using RCBD factorial arrangement in three replication. This study revealed that there was a highly significant difference between the yield and yield components of potato due to the main effect of fertilizer rates. The interaction did not significantly affect any parameter of potato during the study. The highest total and marketable...
An experiment was conducted on a Nitisol of Holetta agricultural research and Jeldu Sub-center u... more An experiment was conducted on a Nitisol of Holetta agricultural research and Jeldu Sub-center using three factors such as potato varieties (Belete, Jalenie and Gudanie), nitrogen rates (87, 110 and 133 kg/ha) and potassium oxide rates (0, 34.5, 69 and 103 kg/ha) that were arranged on randomized complete block design with three replications. The data were subjected to Proc GLM model of SAS software version 9.2. Higher tuber nitrogen content, uptake and utilization was obtained from Holetta location than Jeldu. Increasing nitrogen fertilizer from 87 to 133 kg/ha reduced the tuber nitrogen uptake and utilization efficiency by 75.56 and 75.49%, respectively. The interaction between variety and location also highly significantly affected tuber nitrogen content and nitrogen utilization efficiency. The interaction between nitrogen and variety affected tuber nitrogen in percent and protein content highly significantly. The highest tuber nitrogen and protein content was obtained from Belet...
International Journal of Horticulture, Agriculture and Food science, 2021
International Journal of Horticulture, Agriculture and Food science, 2021
One argument for early intervention for reading difficulties is that it can sustainably improve c... more One argument for early intervention for reading difficulties is that it can sustainably improve children's reading competence trajectory (the 'inoculation model'), but there are virtually no studies on sustained effects at the end of compulsory schooling. This study reports on a 10-year follow-up of a widely used early literacy intervention, Reading Recovery. UK schools adopting Reading Recovery enrol selected teachers for a year's training, after which they provide one-to-one tutoring and typically act as literacy advisors. In a quasi-experimental, intention to treat, design, 293 6-year-olds with reading difficulties in 42 London schools were assigned to Reading Recovery (RR), standard provision in Reading Recovery schools (RRS) or standard provision in comparison schools (CS). Children were traced at ages 14 (204) and 16 (271) and data collected from the National Pupil Database. At age 14 and 16, significantly fewer RR than CS pupils were officially identified as having special educational needs, a potential consequence of reading difficulties. Using multi-level modelling and controlling for baseline reading and Free School Meal status (an indicator of poverty), at age 16 the RR group significantly outperformed the CS group on academic qualifications (GCSEs) (d = 0.52). However, the RRS group also performed significantly better than the CS group (d = 0.37), consistent with the fact that standard provision for weaker readers in RR schools differed from that provided in CS. Thus, these results support the long-term effects of early intervention but raise questions about the importance of whole-school effects and systemic intervention.
Advances in Crop Science and Technology, 2016
Field experiment was conducted at Holetta and Jeldu Agricultural Research Station in the central ... more Field experiment was conducted at Holetta and Jeldu Agricultural Research Station in the central highlands of Ethiopia to determine the rates of Nitrogen (N) and Potassium (K) fertilizers on growth, yield and yield components of potato. 4 × 32 factorial treatment was arranged in completely randomized block design with three replications on plot size of 3 m × 3 m during 2014-2015 cropping season. Nitrogen (87 kg, 110 kg and 133 kg/ha), Potassium (0, 34.5 kg, 69 kg and 103.5 kg/ha) and potato varieties (Betete, Gudenie and Jalenie) were used. Data were analyzed by using SAS software Version 9.2. The interaction effect of potassium and nitrogen fertilizers did affect marketable tuber number and plant height significantly. Gudenie produced the highest marketable yield (30.53 ton/ha) in 2015 with application of 69 kg/ha potassium and 110 kg/ha nitrogen rates while lowest marketable yield (16.67 ton/ha) was obtained from Belete variety at 0 kg/ha potassium rate and 87 kg/ha nitrogen rate. From these results, it can be concluded that interaction of nitrogen and potassium rates affected significantly plant height and marketable tuber numbers. Therefore, it is better to apply 69 kg/ha potassium and 110 kg/ha nitrogen for potato production to obtain reasonable economic yield at sites similar to experimental locations.