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fertility
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  • Response of a sandy soil and maize plants to zinc fertilizers
    颁布单位：[University of the Free State] |  颁布时间：2014 |  实施时间：2014 |  学科分类：[["Zinc, source","Extraction, method","Plant, parameters","Uptake","Concentration","Dissertation, (M.Sc.Agric., (Soil,, Crop, and, Climate, Sciences)--University, of, the, Free, State,, 2014","Fertilizers, --, Africa,, Southern","Corn, as, feed","Soil, fertility, and, fertilizers."]]
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  • The influence of land use on humic substances in three semi-arid agro-ecosystems in the Free State
    颁布单位：[University of the Free State] |  颁布时间：2009 |  实施时间：2009 |  学科分类：[["Fulvic, acid","Humic, acid","Organic, carbon","Soil, organic, matter","Organic, nitrogen","Humus","Land, use, --, Envrionmental, aspects","Soil, fertility, --, South, Africa, --, Free, State","Dissertation, (M.Sc., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2009"]]
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  • Fertility recovery in sandy soils under bush fallow in southern Mozambique
    颁布单位：[University of the Free State] |  颁布时间：2008 |  实施时间：2008 |  学科分类：[["Agroecosystem","Ecological, importance","Exchangeable, bases","Organic, matter","Shifting, cultivation","Vegetation, composition","Fallowing, --, Mozambique","Sustainable, agriculture, --, Mozambique","Soil, fertility, --, Mozambique","Thesis, (Ph.D., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2008"]]
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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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  • Organic matter restoration by conversion of cultivated land to perennial pasture on three agro-ecosystems in the Free State
    颁布单位：[University of the Free State] |  颁布时间：2002 |  实施时间：2002 |  学科分类：[["Coarse-textured, soils","Organic, carbon","Semi-arid, agro-ecosystems","Sustainable, agriculture","Total, nitrogen","Soils, --, Nitrogen, content","Agricultural, ecology","Soil, fertility, --, South, Africa, --, Free, State","Dissertation, (M.Sc.Agric., (Soil,, Crop, and, Climate, Sciences))--University, of, the, Free, State,, 2002"]]
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