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The decline of soil organic matter (SOM) and its associated fertility is one of the most important constraints to enhanced crop productivity in sub-Saharan Africa. Integrated soil fertility management recognizes the potential benefits of the combined use of organic residue and mineral fertilizer inputs for improved crop yield and SOM build up. However, these benefits may be controlled by residue quality...
Increasing global atmospheric CO2 concentration can potentially affect C cycling in terrestrial ecosystems. This study was conducted to assess the impact of elevated CO2 concentration on soil organic matter and aggregate dynamics in Lolium perenne and Trifolium repens pastures. Soil samples from a 6 year old `free air CO2 enrichment' (FACE) experiment were separated in four aggregate size classes...
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