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  • Influence of long-term wheat residue management on some fertility indicators of an avalon soil at Bethlehem
    颁布单位：[University of the Free State] |  颁布时间：2004 |  实施时间：2004 |  学科分类：[["Dissertation, (M.Sc.Agric., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2004","Soil, fertility, --, South, Africa, --, Free, State, --, Bethlehem","Crop, residue, management, --, South, Africa, --, Free, State, --, Bethlehem","Tillage, --, South, Africa, --, Free, State, --, Bethlehem","Organic, matter","Straw, disposal","Weed, control, methods","Soil, acidity","Plant, nutrients"]]
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