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A meta-analysis of the effects of land management practices and land uses on soil loss in Ethiopia

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Relation http://oar.icrisat.org/12037/
https://doi.org/10.1016/j.agee.2021.107635
 
Title A meta-analysis of the effects of land management practices and land uses on soil loss in Ethiopia
 
Creator Desta, G
Abera, W
Tamene, L
Amede, T
 
Subject Soil
Ethiopia
 
Description Over the last three decades, land management practices have been extensively implemented in Ethiopia.
Different attempts have been made to assess the effects of land management practices on soil loss at plot scales
under a range of climatic and land use conditions. However, the plot-level studies were mostly focused on limited
sites and were inadequate to show the effects of land management and land cover practices across a range of
practices and under various environmental contexts. A meta-analysis of 82 plot-level experiments in 59 sites was
conducted to assessing the effects of land management practices and land use/cover types on soil loss relative to
control practice. Random effects were accounted for the association of soil loss and environmental factors
including mean annual rainfall, soil texture, and slope length. The results showed that there were significant
mean soil loss differences among the categories of land management and land cover practices (p < 0.049). A
large amount of residual heterogeneity (I2 = 92%) suggests that the groups of practices are heterogeneous.
Mechanical erosion control and agronomic practices with the largest number of studies and somewhat area
closure showed large heterogeneity across experiments.The overall mean soil loss ratio of mechanical (0.086, R2
= 81%), agronomic (0.21, R2 = 85%), and area closure (0.09, R2 = 52%) practices were significant to reduce soil
loss. There was no residual heterogeneity exhibited across studies for the rest of four groups of practices. The
mean soil loss ratio of mechanical practices under non-cropland, annual cropland cover, drainage, and noncropland
cover types were 0.12, 0.14, 0.27, and 0.29, respectively. Yet, with a certain level of inconsistency,
the overall effects of all groups of land management and land cover practices were positive. In general, the
sensitivity of environmental factors and their magnitude of association with soil loss ratio could imply that the
effects of the range of land management practices and land cover types on soil loss are very contextual.
 
Publisher ELSEVIER
 
Date 2021-09-01
 
Type Article
NonPeerReviewed
 
Identifier Desta, G and Abera, W and Tamene, L and Amede, T (2021) A meta-analysis of the effects of land management practices and land uses on soil loss in Ethiopia. Agriculture, Ecosystems and Environment (TSI), 322 (107635). pp. 1-12. ISSN 1873-2305