Effect of cultivation on physical and chemical properties of a Vertisol in middle Awash Valley, Ethiopia

Girma, Tsegaye

doi:10.1080/00103629809369969

Cited by 15 publications

(9 citation statements)

References 11 publications

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“…As carbon to nitrogen ratio (C/N) is an index of nutrient mineralization and immobilization where by low C/N ratio indicates higher rate of mineralization (Brady and Weil, 2002), rate of soil organic matter mineralization is lower under closed area with SWC. In addition, the lower C inputs because of less biomass C return on free grazing lands caused the reduction of SOM and TN (Girma, 1998). The most evident impact of grazing is the removal of a major part of above ground biomass by livestock that decreases the input of aboveground litter to the soil.…”

Section: Soil Chemical Propertiesmentioning

confidence: 99%

Effects of integrating different soil and water conservation measures into hillside area closure on selected soil properties in Hawassa Zuria District, Ethiopia

Tiki¹,

Tadesse²,

Yimer³

2015

J. Soil Sci. Environ. Manage.

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Land degradation is a serious global problem. Pursuant to the alarming environmental degradation, the government and non-governmental organizations have implemented various land rehabilitation programs. Among this the predominant one is area closures, through tree-planting and physical conservation measures such as terracing. This study was designed to investigate the impact of integrating soil and water conservation (SWC) measures into the area closure on the selected soil properties based on comparative analysis between closed area with SWC, closed area without SWC and open grazing land. A total of 30 composite soil samples from 0 to 15 cm depth were collected with 10 replications from each land uses. Soil parameters such as bulk density (BD), soil moisture content (MC), soil organic matter (SOM), total nitrogen (TN), pH, electrical conductivity (EC) and texture were analyzed. Data was analyzed statistically by using SPSS software packages. Mean comparison were made by using Tukey HSD test at P = 0.05. Results showed that higher mean MC, SOM and TN were recorded under closed area with SWC than closed area without SWC and open grazing while mean EC and pH were comparatively lower under closed area with SWC. Texture, BD and C/N ratio shows no significant variation with land uses. These results indicated that integrating SWC measures into area closure have a potential to improve soil properties. The findings generally suggest that integrating SWC measures into area closure was found to be the better option to improve physico-chemical conditions of degraded lands. Additional research was also recommended for practical generalization considering other variables like vegetation parameters that were not addressed in this study.

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Section: Soil Chemical Propertiesmentioning

confidence: 99%

Effects of integrating different soil and water conservation measures into hillside area closure on selected soil properties in Hawassa Zuria District, Ethiopia

Tiki¹,

Tadesse²,

Yimer³

2015

J. Soil Sci. Environ. Manage.

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“…Due to forest clearance lower total N content in soil was reported by several authors from different parts of the world (Girma 1998;Jing-cheng et al 2004). DeBano et al (1979) reported that losses of soil N can occur when heated to temperature as high as 100 o C, which may happen during burning associated with shifting cultivation.…”

Section: Discussionmentioning

confidence: 99%

Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Haque¹,

Gupta²,

Miah³

2014

Journal of Forest and Environmental Science

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This research reports the effects of shifting cultivation on soil environment collecting samples from 0-5 cm soil depth from five locations viz. at Burburichhara, Maichchari, Longadu, Sukurchhari and Muralipara in Rangamati district of Chittagong Hill Tracts (CHTs). Soil analyses showed that fungal and bacterial population, microbial respiration and active microbial biomass, maximum water holding capacity, conductivity and moisture contents were significantly (at least p≤0.05) lower in shifting cultivated soil compared to adjacent mixed tree plantations at all the sites. On an average in soils of 5 different shifting cultivated lands fungal population was 1.33x10 5 CFU/g dry soil and bacterial population 1.80x10 7 CFU/g dry soil and in mixed plantations fungal population was 1.70x10 5 and bacterial population 2.51x10 7 CFU/g dry soil. Organic matter and exchangeable Ca and Mg contents were significantly (at least p≤0.05) lower and bulk density significantly (at least p≤0.05) higher in shifting cultivated land in most of the locations compared to adjacent mixed tree plantations. Ratios of microbial respiration and organic carbon as well as active microbial biomass and organic carbon were distinctly lower and pH higher at 3 locations in shifting cultivated soils compared to mixed plantations. Findings of various soil properties, therefore, suggest that shifting cultivation has deteriorating effects on soil environment.

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“…Thus carbon fractions resulting from the decomposition of acacia are more resistant to degradation and therefore persist for longer times than those resulting from Gliricidia decomposition. The lower levels of soil organic carbon fractions in cultivated soils may have resulted from a combination of low carbon inputs because of less biomass C return on harvested land and greater C losses because of aggregate disruption, increased aeration by tillage, crop residue burning, accelerated water erosion and livestock grazing [26,27]. In contrast, higher soil organic carbon contents of soils under Acacia and Gliricidia land uses are probably due to higher litter production and N fixation by the leguminous Acacia [28] and Gliricidia biomass.…”

Section: Wwwijeabcommentioning

confidence: 99%

Effects of land use on Soil Organic Carbon fractions in soils of Njala Landscape in Sierra Leone

Amara¹,

Koroma²,

Kamanda³

et al. 2016

IJEAB

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Effect of cultivation on physical and chemical properties of a Vertisol in middle Awash Valley, Ethiopia

Cited by 15 publications

References 11 publications

Effects of integrating different soil and water conservation measures into hillside area closure on selected soil properties in Hawassa Zuria District, Ethiopia

Effects of integrating different soil and water conservation measures into hillside area closure on selected soil properties in Hawassa Zuria District, Ethiopia

Shifting Cultivation Effects on Soil Environment in Upland Watershed of Bangladesh

Effects of land use on Soil Organic Carbon fractions in soils of Njala Landscape in Sierra Leone

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