Effects of land use changes on the dynamics of selected soil properties in the Northeast Wollega, Ethiopia

Adugna, A.; Abegaz, Assefa

doi:10.5194/soild-2-1075-2015

Cited by 4 publications

(9 citation statements)

References 40 publications

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“…Additionally, the CEC of the study area have higher CEC than the soil of tropics. In tropical region, soils of bush vegetation and permanent cropping have CEC of 12.5 and 8.8 cmol (+) kg − 1 , respectively on the top 15cm depth of soil [42] and similar result also reported by [31,42].…”

Section: Of Land Uses On Exchangeable Cations Cec and Pbssupporting

confidence: 80%

“…The pH (H 2 O) values varied from 5.2 to 5.9) among the land uses. Low pH value was seen in grazing (5.2) and cultivated lands (5.2) whereas high pH value was seen in forest land (5.9), which are in line is with the ndings of [31]. According to the rate classi ed by [38] the pH of forest land categorized as moderately acidic and that of grazing and cultivated lands ranged in strongly acidic soil.…”

Section: Effects Of Land Use On Selected Soil Physical Propertiessupporting

confidence: 80%

“…Overall, the C: N ratio values were greater than 10 for all the three land use. According to [49] ratings of C: N, soils in the study areas can be categorized as low (< 11) to medium (11)(12)(13)(14)(15). The C: N ratio of forest and grazing land fall in the low class whereas that of cultivated land falls in medium category.…”

Section: Effects Of Land Use On Selected Soil Physical Propertiesmentioning

confidence: 99%

“…These can decrease available soil nutrients and easily trigger the conversion of the remnant forests to grazing and cultivation lands In addition, due to rapid population growth, shortage of land for agricultural activity, and more food demand, natural forest and grazing lands of Ethiopia have been converted to cultivated land especially in the Northern part and in most part of Oromia region of the country. Such conversions may soil degradation, reduction in soil fertility, accelerated soil erosion and soil loss In return, this will cause the decrease in the productivity of the land and overall deterioration of soil physical and chemical properties ( [10,11]. This is particularly the main problem in the West Shoa Zone thereby affecting soil micro and macro nutrients and their distribution including in uencing dynamics of soil biological transformation [12].…”

Section: Introductionmentioning

confidence: 99%

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Selected Soil Properties under different land uses and Carbon Sequestration in Gurra Watershed: The Case of Chalia District, West Shoa Zone, Oromia, Ethiopia

Chimdi

Gurmessa

2022

Preprint

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This study was conducted in the Gurra watershed of the Chelia District to determine the current state of soil characteristics as well as the current organic carbon and equivalent CO2 sequestration potential of the watershed's various land uses (forest, grazing, and agricultural). Random sampling techniques were used to collect composite soil samples from (0-30cm) depth for each land use, which were then tested for selected soil physicochemical parameters using conventional protocols. The forest and cultivated land textural classes were loam clay loam and loam clay loam, respectively. Soil pH in forest and grazing lands respectively were 5.9 and 5.2. Higher BD in grazing (1.113g/cm3) and lower (0.818g/cm3) in forest land was recorded. The values of micro nutrients Fe, Cu, Mn and Zn (282.07, 3.768, 44.94 and 2.82ppm) and Fe, Cu, Mn and Zn respective values of (107.44, 0.932, 16.51 and 0.433ppm) were recorded forest and cultivated lands, respectively. Similarly, the highest (10.24%) and lowest (4.31%) SOM were recorded in forest and cultivated lands. The same was true for TN(0.56, 0.22)%, available P(16.28, 0.28) ppm and total P(37.28, 0.64) ppm, CEC(64, 37.3)cmol(+)kg-1, exchangeable bases(54.26, 21.66) cmol (+)kg-1 and OC(5.94, 2.5)%. However, exchangeable acidity (1.6, 0.48) cmol (+) kg-1 was recorded in cultivated and lowest in forest land. The watershed sequestered 84,150 tons of CO2e and stored 22,930 tons of SOC with estimated value of USD 336,600 in the current value. Similarly, SOC sequestration potential and equivalent CO2 sink potential were deceasing (14.58, 8.92 and 6.33)t/h and(53.52, 32.72 and 23.23) t/ha from forest, Grazing and cultivated lands, respectively. Land uses have an effect on soil physicochemical proprieties and also on climate changes. Lowest amount of OC, OM and TN was recorded in cultivated land. SOC storage potential of cultivated land (6.33Mg/ha) was almost 2 times lower than that of forest land (14.58Mg/ha). In this study, forest land was the major reservoir of SOC and sinks of CO2e and plays a significant role in mitigating climate change and improving the fertility and productivity of the lands. Effects of land use changes can be seen not only in soil properties but also on climate changes. Therefore, due attention shall be given to improve soil properties, to conserve natural resources by using crop residue, crop rotation, applying fallowing and agro-forestry practices as well as incorporating SOC in polices of green economy and planting N-fixing species in the area.

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Section: Of Land Uses On Exchangeable Cations Cec and Pbssupporting

confidence: 80%

Section: Effects Of Land Use On Selected Soil Physical Propertiessupporting

confidence: 80%

Section: Effects Of Land Use On Selected Soil Physical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selected Soil Properties under different land uses and Carbon Sequestration in Gurra Watershed: The Case of Chalia District, West Shoa Zone, Oromia, Ethiopia

Chimdi

Gurmessa

2022

Preprint

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“…(Zigba), Olea europaea (Woyera), Rosa abyssinica (Kega) and Carissa edulis (Agam). Nitosols are the dominant soil type on undulating ground and steep slopes (Adugna and Abegaz, 2016). Relatively flat river valleys have well-developed Vertisols, whereas Regosols and Cambisols are also found on steep slopes areas.…”

Section: Study Areamentioning

confidence: 99%

Random and Systematic Land-Cover Transitions in North-Eastern Wollega, Ethiopia

Adugna¹,

Abegaz²,

Legass³

et al. 2017

Bois for. trop.

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Africa has seen significant changes in land cover at different spatial scales. Changes in Land Use and Land Cover (LULC) include deforestation and subse- quent use of the land for arable cropping, conversion to grassland or urbanization. The work reported in this article was conducted to examine land cover transi- tions in north-eastern Wollega (Ethiopia) between 2005 and 2015. The analysis focused on land cover transitions that occurred systematically or randomly, and identified the main drivers for these changes. Landsat data from 2005 and 2015 were examined to better unders- tand the various dimensions of land cover transitions, namely: swaps, losses, gains, persistency and vulnerability. Results showed that shrubland exhibited the largest gain (22%), with a 63% gain- to-loss ratio, a 47% gain-to-persistence ratio and a positive net change-to-persis- tence ratio of 46%. Cropland showed the largest loss (19%) while grassland was the most stable type of land cover des- pite some fluctuation (»10%) observed during the 10-year period. The land cover transition was dominated by systematic processes, with few random processes of change. Systematic land cover transitions such as agricultural abandonment and vegetation re-growth were attributed to regular or common processes of change. This study suggests that the implementa- tion of practices conducive to sustainable intensification of existing agricultural land, supported by policies that promote increased diversification of Ethiopian agriculture, would mitigate pressure on forests by avoiding their future conver- sion to cropland.

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Phosphate Response by Indigenous Microbes and Mycorrhizal Inoculation on Corn in Inceptisol Soil

Kulsum¹,

Hanudin²,

Widada³

2023

Advances in Biological Sciences Research

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The low availability of phosphate is due to fixation by Al and Fe at acid pH, making it unavailable to plants. These problems can be overcome through the utilization of soil microbes and Arbuscular Mycorrhizal Fungi (AMF) that can associate with corn plants. This study aims to determine the effect of indigenous microbes and arbuscular mycorrhiza on phosphate nutrients. The experiment used a nested design with three factors. The first factor is land use, consisting of inceptisol moorland soil and inceptisol forest soil. The second factor is soil sterilization consisting of sterile and non-sterile. The third factor is mycorrhiza, consisting of non mycorrhiza and mycorrhiza inoculation. The results showed that land use had a significant effect on total P, potential P, Al oxide, and Fe oxide. However, it did not significantly affect available P, P uptake, and root CEC. Soil sterilization and mycorrhiza inoculation significantly affected available P, total P, potential P, P uptake, Al oxide, Fe oxide, and root CEC. The treatment interaction significantly affected all parameters, except P uptake and root CEC. However, there was a negative relationship between Al and Fe oxide content on available P and P uptake. The best phosphorus response was non sterile forest inceptisol soil with mycorrhizal inoculation.

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Effects of land use changes on the dynamics of selected soil properties in the Northeast Wollega, Ethiopia

Cited by 4 publications

References 40 publications

Selected Soil Properties under different land uses and Carbon Sequestration in Gurra Watershed: The Case of Chalia District, West Shoa Zone, Oromia, Ethiopia

Selected Soil Properties under different land uses and Carbon Sequestration in Gurra Watershed: The Case of Chalia District, West Shoa Zone, Oromia, Ethiopia

Random and Systematic Land-Cover Transitions in North-Eastern Wollega, Ethiopia

Phosphate Response by Indigenous Microbes and Mycorrhizal Inoculation on Corn in Inceptisol Soil

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