Growth Rate and Doubling Time of Yam and Cassava Production in Nigeria (original) (raw)
Related papers
Cassava production in Nigeria: trends, instability and decomposition analysis (1970-2018
Heliyon, 2020
This study analyzed the compound growth rate (CGR) and the contributions of yield and area to cassava production output in Nigeria. During the period, TE1970-TE2018, production followed an upward trajectory from 9.3 million tonnes (1970) to 59.5 million tonnes (2018) while yield oscillated between 7.9tonnes/ha (TE2014) and 11.9tonnes/ha (TE2010). At this period, the CGR per year for yield declined (-0.2%), harvested area increased (10.9%) and production increased (10.6%). The decomposition analysis for the period revealed that, increase in output was largely due to expansion of harvested area (152%) while the interaction between area and yield effect declined production output by 45.8%. Regrettably, during the period, cassava yield also declined production output by 5.8%. The study also found that harvested area has the highest instability index (11.8). In order to further increase and sustain cassava production in Nigeria, intense planting of high yield cassava stems instead of solely expanding cropped area is recommended.
PROJECTION AND RESOURCES ADJUSTMENT IN CASSAVA PRODUCTION IN OYO STATE, NIGERIA
Projection was made by the use of ARIMA model, contribution of area and yield towards cassava production was done by decomposition analysis and adjustment in cropping pattern was estimated by calculating index level. Forecast result showed that maximum value of area is 843.0 thousand hectares which would be expected in 2013-14 while minimum value is 826.0 thousand hectares which is likely to occur by the year 2025-26. Production forecast revealed maximum value of 1407.0 thousand tons which would be expected by 2025-26 and the minimum value of 1181.0 thousand tons in 2012-13.
Time series secondary data on area, production, productivity of cassava and other principal crops in Ibadan Metropolis were arranged into 3 groups P 1 (1980-81 to 1994-95), P 2 (1995-) respectively based on farm sizes. 150 households comprise 50 each from small, medium and large farm, spread over the three areas namely: ajibode, eleyele and ijokodo were conducted using pre-tested interview-schedule and pertain to the agricultural year 2010-11. Absolute relative changes, compound growth rate, component analysis, techniques were employed to analyze the collected data. Area, production and productivity of cassava and wheat increased during period P 1 and overall period P 3 but decreased in their second period P 2 . Area of cassava, wheat and sorghum decline during second period but due to increase in productivity, production increases. The production of cassava and yam shows negative growth in production and this was mainly attributed to higher decline in acreage of the crops despite of positive and significant growth in productivity. The component analysis revealed that yield contribution (55 to 86 per cent) was higher in change of cassava, wheat and maize production while area contribution was significantly higher in other selected crops.
Review of Cassava Production in Nigeria: Trends and Decomposition Analysis Approach
Tarım Ekonomisi Araştırmaları Dergisi, 2020
This study analyzed the growth rate, the instability in the growth trend, and examined the contributions of yield and area to cassava production output in Nigeria. Using time-series of the selected variables which spanned through 1961-2018, the compound annual growth rate (CAGR) was estimated for the harvested area, production, and yield of cassava. The study adopted Coppock's instability index (CPII) to measure instability in cassava production. Between the period, TE1963-2018, cassava yield oscillated between 9.1 tonnes/ha (TE2018) and 11.9 tonnes/ha (TE2010) while the output fluctuated between 7.8 million tonnes (TE1963) and 59.5 million tonnes (TE2018). In this same period, the CAGR for yield (0.1%), area (9.7%) and production (9.9%) were positive and statistically significant at 1% except for yield. The decomposition analysis for the period revealed that the increase in output was largely due to an increase in area harvested during the period (110.4%). In view of these and other findings, the study recommends intensive planting of improved cassava varieties under well mapped out sustainable strategies to optimize production.
Impact of agricultural policy regimes on the output of food crops in nigeria (1980 – 2015)
Global Journal of Agricultural Sciences, 2022
The study evaluated the impact of agricultural policy regimes on the output of food crops in Nigeria (1980-2015). The specific objective was to; determine the growth rate of selected crop output. Time series data were used for the study. Data used in the study were obtained from Food and Agricultural Organization (FAO) crop production database for Nigeria, covering the period 1980-2015, and was analyzed using both descriptive and inferential statistics. Growth model was used to examine the trend in selected crop output. The study showed that the compound growth rates for all the crops were positive; cassava (4.92%), cocoa (2.61%), maize (5.84%), palm oil (2.84%) and rice (4.15%). This implies that there was a moderate increase in the output of the selected crops over the years. The compound growth rate in the output of maize among the crops considered was highest (5.84 % per annum) followed by cassava and was slow in cocoa with a compound growth rate of 2.61 % per annum. This result suggests that among the crops considered, maize is witnessing appreciable increase in production. The result specifically leads to the conclusion that output of cassava and rice had a direct influence on GDP growth in Nigeria from 1980 to 2015. The study therefore recommends that, the slow process of growth (deceleration) in the output of cassava, cocoa, maize and rice could be enhanced by the use of improved extension services and provision of input supports to the farmers involved in the cultivation of these crops.
Future Trends in Cassava Production: Indicators and its Implications for Food Supply in Nigeria
Asian Journal of Agricultural Extension, Economics & Sociology, 2021
The growing demand for cassava and its products has continued to stretch the supply of cassava globally. Nigeria is a leading producer of cassava in the world yet, there are concerns that if appropriate policy strategies are not adopted to increase production, the current fragile situation of food insecurity in Nigeria may be worsened. Besides the increasing number of gigantic cassava-based industries spring up in Nigeria, the rapidly growing population of consumers is another factor that may further disrupt the relatively stable cassava market in Nigeria in the future. Therefore, "ceteris paribus", the study determined the appropriate quantitative models to forecast the trends in cassava production indictors in Nigeria. Using the historical series (1961-2018), 12-year period (2019-2030) forecasts were made for each of the production indicators as follows: 106 million tonnes (production output), 7.7 tonnes/ha (yield) and 9.6 million hectares (cropped area) in 2030. The study extrapolated the expected food supply from the expected production output in the forecast period using the 2014 FAO estimates of food supply per caput. Thus, in 2030, cassava food supply per caput was found to decline from 267 Kcal/capita/day in 2014 to 239 Kcal/capita/day. The study concludes that despite keeping the future demand of the growing cassava-based industries constant, cassava production is expected to continually increase but future food supply per caput would decline. However, the growing cassava-based industries globally is expected to hugely influence the future cassava market dynamics.
Cassava Productivity Growth in Nigeria
Asian Journal of Research in Agriculture and Forestry
Cassava has gained prominence in the world and has become economic crop in the Nigerian agricultural sector. Secondary data was used for this study. The required variables were extracted from General Household Survey Panel Data (GHS-P). The GHS-P is a nationally representative survey of households across Nigeria covering urban and rural sectors. Analytical tools used included Total factor productivity and Markov chain. 82% of populations of Cassava farmers are in the rural areas and close to 73% were young adults including both male and female involved in cassava production. Approximately 65% of the cassava based farmers were single that not yet married and most of the farmers were educated and about 80% and 98% of the cassava based farmers did not have access to credit facilities and extension personnel respectively. Generally, the cassava productivity growth was erratic and very small proportion of cassava farmers that were in lower productivity reduced overtime, while the minimal...
Tarım Ekonomisi Araştırmaları Dergisi, 2021
The increasing trend in the cases of armed conflicts and insecurity in Nigeria could have had some devastating effects on the production of cassava and food supply in Nigeria. Therefore, in this perspective, the historical series (1961-2018) was modeled and forecasts of a 7-year period (2019-2025) of some selected cassava production indicators in Nigeria were made. The ARMA/ARIMA forecasts were made from the selected series. ARIMA (5,1,0). ARMA (1,1) and ARIMA (1,1,3) were selected to fit production series, yield series, and harvested area series in that order. Findings showed that output and yield indicators would increase in a slothful manner during the forecast period with an average of 60 million tonnes and 10 tonnes/ha respectively. The trajectory of the area of land that would be cultivated in this period shows farmers would still be adopting more extensive production patterns by expanding the area cultivated instead of cultivating more performing cassava cultivars. The implication of this on food availability was explored under two scenarios: only 84% of total cassava output would be available for consumption; and that 29% of the 84% would be lost during post-harvest activities. In view of the importance of cassava, this study recommends that farmers should plant improved cultivars.
International Journal of Emerging Scientific Research
This study was carried out to analyse cassava production, prospects and challenges in Irepodun local government area, Kwara State, Nigeria. It aimed to examine the determinant variables and determine the profitability level of cassava enterprises. The study was based on primary data obtained with the aid of structured questionnaire from 100 cassava farmers drawn through multi-stage sampling techniques from the study area. Data were analysed using descriptive statistics, ordinary least square (OLS) regression model and gross margin analysis. The result of the OLS regression estimates showed that farm size, cost of fertilizer application, farm size, herbicides, family and hired labour were significant variable affecting cassava production in the study area. Fertilizer, farm size and hired labour are significant at 1% while herbicide and family labour are significant at 10%. The study found that the average gross margin per hectare for cassava production in the study area was ₦24,749.2...