Dr. Mohammed Abaoli - Profile on Academia.edu (original) (raw)

Videos by Dr. Mohammed Abaoli

This video can help you simply animate your presentation by using simple technologies. You will m... more This video can help you simply animate your presentation by using simple technologies. You will make your presentation attractive and lovable by your audiences after done with this video.

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This video contains the Scientific Research definitions, methodologies and designs. particularly ... more This video contains the Scientific Research definitions, methodologies and designs. particularly it implies on Biophysical Sciences.

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Papers by Dr. Mohammed Abaoli

The Significance of Salinity Level on Seed Germination and Seedling Growth of Selected Commiphora Species in Yabello district, Southern Ethiopia

FoodSciRN: Other Food Sustainability & Security (Topic), 2019

Soil Quality Status under Dryland Vegetation of Yabello District, Southern Ethiopia, 2021

The current research has investigated the soil quality status under dryland vegetation of Yabello... more The current research has investigated the soil quality status under dryland vegetation of Yabello district, Southern Ethiopia in which we should identify the nature and extent of salinity problem of the area for further research bases. About 48 soil samples were taken from 0-30, 31-60, 61-90 and 91-120 cm soil depths by opening 12 representative soil profile pits at 1.5 m depth. Soil color, texture, bulk density, Soil Organic Carbon (SOC), Cation Exchange Capacity (CEC), Na, K, Mg, Ca, CaCO3, gypsum (CaSO4), pH, Sodium Adsorption Ratio (SAR), Exchangeable Sodium Percentage (ESP) were analyzed. The dominant soil texture was silty-clay-loam. Bulk density varied from 1.1 to 1.31 g/cm 3. High SOC content was observed in 0-30 cm. The soil pH ranged from 7.1 to 8.6. The electrical conductivity shows indirect relationship with soil depth while CaCO3 and CaSO4 concentrations were observed in a direct relationship with depth. About 41% are non-saline, 38.31% saline, 15.23% saline-sodic and 5.46% sodic soils. Na concentration in saline soils was greater than Ca and Mg in all the soil depths. Ca and Mg contents were higher above 60 cm soil depth in non-saline soils. The concentrations of SO2-4 and HCO-3 were observed to be higher at the most lower depth than upper. SAR value tends to be higher at lower depths in saline and saline-sodic soils, but decreases at lower depth of the non-saline soils. The distribution of ESP above 60 cm depth was in an increasing order in saline and saline-sodic soils. The result of the research has shown the direction to which extent of salinity we should consider for the Commiphora plant species we want to grow on the area.

International Journal of Agricultural and Biosystems Engineering, 2018

The current study has addressed the effect of Hazelnut (Corylus avellana) agroforestry on carbon ... more The current study has addressed the effect of Hazelnut (Corylus avellana) agroforestry on carbon sequestration. Eight sample plots were collected from Hazelnut (Corylus avellana) agroforestry using random sampling method. The diameter of all trees in each plot with ≥ 2cm at 1.3m DBH was measured by using a calliper. Average diameter, aboveground biomass, and carbon stock were calculated for each plot. Comparative data for natural forestland was used for C was taken from KTU, and the soil C was converted from the biomass conversion equation. Biomass carbon was significantly higher in the Natural forest (68.02Mgha⁻¹) than in the Hazelnut agroforestry (16.89Mgha⁻¹). SOC in Hazelnut agroforestry, Natural forest, and arable agricultural land were 7.70, 385.85, and 0.00 Mgha⁻¹ respectively. Biomass C, on average accounts for only 0.00% of the total C in arable agriculture, and 11.02% for the Hazelnut agroforestry while 88.05% for Natural forest. The result shows that the conversion of arable crop field to Hazelnut agroforestry can sequester a large amount of C in the soil as well as in the biomass than Arable agricultural lands.

The Significance of Salinity Level on Seed Germination and Seedling Growth of Selected Commiphora Species in Yabello district, Southern Ethiopia, 2029

The experiment was carried out in Wanja Public Nursery sites in Gera, Southwest Ethiopia; in tran... more The experiment was carried out in Wanja Public Nursery sites in Gera, Southwest Ethiopia; in transparent plastic greenhouses on pots and laboratory in the 2018 season for Commiphora boranensis, Commiphora habessinica and Commiphora corrugate species by using complete random block design with four treatments and five replications.
All salinity levels (0.49dS/m or control, 8, 16 and 24dS/m) were then applied to each species with 5 replications making 20 treatments among the total of 60 pots. Data was collected on root and shoot length, root length density, root and shoot biomass by destructive methods. Germination percentage was recorded on completion of germination
in lab. All data were tested at P < 0.05 for significant differences. C. corrugate and C. boranensis recorded only 0 and 40% seed germination, respectively at 24dS/m salinity level, and C. habessinica was more tolerant to salinity with 51.3% germination at 24dS/m. As salinity increased to 24dS/m ECe, the shoot length of C. corrugate was null.
The result of C. habessinica recorded the highest shoot dry matter at control level and was radically declined to
2.05g and 1.43g at 16ds/m and 24ds/m levels respectively, while shoot dry matter of C. corrugate and C.
habessinica at 24ds/m showed no statistical differences. No statistical differences were observed between C. boranensis and C. corrugate at 8ds/m for root length and density. As salinity increased to 24dS/m, the root dry matter decreased for all species. Generally, C. habessinica showed best tolerance in salinity increment followed by
C. boranensis and C. corrugate respectively. So, we can conclude that C. habessinica better fit to restore dryland ecosystem with salt affected soils at least with less or equal to the current level of salinity used in the experiment.

እስልምና እና ዓለም አቀፍ የሰብአዊነት ሕግ በአምባገነናዊ የመንግስት ስርዓት ውስጥ, 2020

This study investigated the effects of different Nitrogen (N) levels and irrigation regimes on yi... more This study investigated the effects of different Nitrogen (N) levels and irrigation regimes on yield and yield components of Onion (Allium cepa L.) at Hawassa area district, southern Ethiopia in 2012. It was a factorial experiment laid out in split plot design with three replications of four irrigation regimes and five N levels. Data on yield and yield components were collected and analyzed. Application of N at different levels and irrigation regime increased total and marketable bulb yield over the unfertilized plot, and their interaction showed a significant effect on the average bulb weight; mean bulb diameter and water productivity of onion. Further increase in N application beyond 100 kg Nha –1 and irrigation beyond 75% crop evapo-transpiration ETc did not bring about significant changes. Therefore, 100 kg Nha-1 and irrigation at 75% ETc can be tentatively recommended for onion production to the studied area.

Abstract- The current study evaluated the differences in soil and biomass carbon (BC) stocks of n... more Abstract- The current study evaluated the differences in soil and biomass carbon (BC) stocks of native forest, annual crop field and coffee based agroforestry at Gera, South-west Ethiopia. A total of 24 sample plots were collected by Stratified random sampling method. After measuring
the required parameters; BC (above and below ground), and SOC, texture, bulk density and pH
were analyzed. The results showed that, BC significantly varied with land use types. On the other
hand, the SOC under native forest and coffee based agroforestry has no significant difference,
while it shows significant difference under the annual crop field. The present study indicated that,
the total carbon stock in the native forest is greater than coffee based agroforestry which shows
much greater difference than annual crop field. This may indicate that, conversion of annual crop
field to coffee based agroforestry can increases carbon stock and sequestration potential in the
study area.
Keywords: annual crop field; biomass carbon; coffee based agroforestry; land use change; native forest; soil organic carbon.

This study was aimed at evaluating the changes on bulk density, and soil moisture content. Three ... more This study was aimed at evaluating the changes on bulk
density, and soil moisture content. Three residence time
Soil-water conservation (SWC) structures and control land
use type: Agroforestry based SWC for 7 and 3-years
residence, physical barriers of SWC for 3-years residence
and non-SWC land use types with three replications from
the sampling frame. Soil samples for bulk density, and
moisture content determination were collected from upper,
middle, and lower positions of the structures by using an 'X'
design and then averaged for each experimental plot. The
results showed that except for bulk density which was
significant only in the 30-60cm depth layer in case of noSWC

land use type’s soil moisture content showed
significant variations. However, there was no interaction
effect between land use types and depths across all the
parameters considered. Soil moisture content generally
conservation of 7-years residence land use types with low

INTRODUCTION

In Ethiopia, population increases in alarming rate and this
increasing population pressure is identified as the major
driving factor of deforestation (Badege and Abdu, 2003).
Poverty and natural resources/environmental degradation
tend to negatively reinforce each other; that is, as the
land is degraded, agricultural productivity is lowered,
resulting in decreasing incomes and food security and
vice versa (Wakene and Heluf, 2000). This has resulted
in migration of rural poor to urban centers; increased
cultivation of marginal lands; encroachment into forest
increased in the Agroforestry based soil and water values of
bulk density. In contrast, no-SWC land use type showed the
lowest value in moisture content but with highest bulk
density value. The significant variations in soil moisture
content among the treatments can be attributed to
differences in soil carbon contents, and other soil attributes
found within the Agroforestry based land use systems
compared to the conditions in the non- Agroforestry based
practices. It can therefore be recommended that effective
SWC measures should be integrative systems where one
can integrated both the physical and biological SWC
practices simultaneously for improved land health.

The study on the growth and carbon storage of the seven years old Hevea brasiliensis plantation i... more The study on the growth and carbon storage of the seven years old Hevea brasiliensis plantation in Bebeka coffee farm was undertaken and analyzed through stratified randomized block design with sub-sampling analysis of variances. Four randomized stands per planting distance per block were taken as sample plots. The measured data were diameter at breast height (1.3m above the ground); total tree height; merchantable height has taken from field, while carbon density was calculated as = biomass density x 45%. The 2m x 4m dominated with a mean of 13.05 ± 0.3cm followed by 2m x 3m planting distance and the least is 2m x 2m diameter. The result of the study shows that the planting distance influences the diameter at breast height. The 2m x 4m were dominated with mean heights of 9.84 ± 3.13m and 5.9 ± 1.32m, respectively followed by 2m x 2m and the least is the 2m x 3m. The 2mx4m dominated in C density with a mean of 52.13 ± 8.71Mg ha -1 followed by 2m x 3m and the least is 2m x 2m implying that above ground biomass of the plantation is affected by planting distance. The 2m x 4m spaced plantation is significantly different from other spacings while the result of 2m x 3m and 2m x 2m spacing is not significant for both C and biomass density. C density is positively related to all growth traits of Hevea brasiliensis, which indicates is a good C sink bases on the finding of the present study.

The present study has compared the dry weight of fine root biomass of Juniperus procera and Grevi... more The present study has compared the dry weight of fine root biomass of Juniperus procera and Grevillea robusta tree of 15 age years from Gera indigenous Agroforestry, Jimma zone, southwest Ethiopia in July, 2012. On four farmland located on the same altitude, a total of 20 trees were selected from all direction and a center by systematic random sampling method. Both spp are scatter planted on the maize field. Circle was made around each tree at 1m and 1.5m for inner and outer circle respectively. Three coring points were made at each horizontal distance by forming the coring points a circular shape. Soil core was extracted from four vertical soil depths separately by using steel auger. The results were subjected to ANOVA. All statistical computations were made by using SAS. The study result shows for Grevillea robusta: 1.78±0.97, 1.89±0. 95, 1.95±0.93 and 1.77±0.91gm at 1m, and 0.92±0.03, 0.93±0.04, 0.80±0.01 and 0.78±0.02gm at 1.5m, and for Juniperus procera, it shows 2.65±0.09, 2.58±0.10, 2.45±0.28, and 2.32±0.58gm at 1m, while it shows 1.98±0.87, 1.88±0.67, 1.78±0.77and 1.51±0.87gm at 1.5m distance for all the soil depth respectively. Generally, the result from the finding, fine root biomass density is higher at the upper most of the soil depth and closer to the tree bole, and decreases as soil depth and distance from the tree bole increases for both tree species. However, the mean dry weight fine root biomass recorded for Juniperus procera tree was higher than Grevillea robusta tree for both 1 and 1.5m distance.

Teaching Documents by Dr. Mohammed Abaoli

At the end of this unit the learners will be able:  Define weather, climate, meteorology and cli... more At the end of this unit the learners will be able:  Define weather, climate, meteorology and climatology  Identify the various elements of weather and climate  List controls of weather and climate  Explain the importance of studying weather and climate 2 The study of weather and climate primarily focuses on  gaseous envelop, and  the atmosphere, surrounding the earth. Because of continuous exchanges of energy, moisture and air circulations among the spheres, the sub system produce integration. 3  Weather is an atmospheric condition for a short period of time, daily or short term variation of different conditions of the lower air in terms of : temperature, pressure , wind, rainfall etc,  It is also takes in to account extreme values, and thus, climate is the sum total of daily weather events as observed over a long period. 4  Climate: the "long term state of the atmosphere encompassing the aggregate of all weather phenomena".  Climate is broader term than weather  Integration of weather through large space and time  Summation of weather condition over a given region during comparatively longer period. 5  Factors that affect weather conditions in a specific time and location. These factors include: humidity and precipitation time of day or year local geography pressure and winds cloud formations temperature and sunshine 6  Meteorology: Refers to the study of the physical processes of the atmospheric conditions. ≈It is the physics of air ≈The art and science of production and processing of plant and animal life for the use of human being. ≈Is the system of harvesting solar radiation 7  Climatology, which is the branch of meteorology studies about climate: that is; 1) it seeks to describe and explain the nature of climate: why it vary from place to place and 2) how it is related to the other elements of the natural environment and human activities.  Why is the study of climatology important? 8  They are constituent ingredients out of which climate compounded.  The elements primarily include: sunshine, temperature, humidity, precipitation, air pressure and wind etc. 9 Latitude (Distance from the equator) Altitude Ocean Currents Distribution of Land and the Sea Cloud cover and Humidity  Which climatic control do you think plays a pivotal role in regulating the climate of your area? 10

Drafts by Dr. Mohammed Abaoli

IMPLEMENT PREVENTION AND CONTROLLING PROGRAM OF INVASIVE SPECIES

Books by Dr. Mohammed Abaoli

This Dictionary contains about 25000 Turkish words translated to the targeted languages, more tha... more This Dictionary contains about 25000 Turkish words translated to the targeted languages, more than 70 demonistrative pictures, Turkish alphabets and nubers, and at the final portion there is a human body showing the names of our body parts. The objectives of preparing this dictionary are to bring Afan Oromo to other international languages and familiarize with technologies, to enhance students’ participation in Turkey scholarship while providing material to those already engaged, to enhance Oromo speaking people to learn Turkish and be the first beneficial of Turkey- Africa relationships. Particularly the current Turkey engagement in Africa, the huge investment projects in Ethiopia needs huge number of human power, so that as peoples become familiar to Turkish language, they will have opportunities to be hired at different level, and helping our Turkish brothers while nourishing themselves.