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(Soil
1971

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  • 颁布单位:[University of the Free State] |  颁布时间:1971 |  实施时间:1971 |  学科分类:[["Soil, science","Soils","Thesis, (Ph.D., (Soil, Science))--University, of, the, Free, State,, 1971"]]
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  • 颁布单位:[University of the Free State] |  颁布时间:1971 |  实施时间:1971 |  学科分类:[["Phosphatic, fertilizers","Soils, --, South, Africa, --, Northern, Cape, --, Vaalharts","Soils, --, Phosphorus, content","Dissertation, (M.Sc.Agric., (Soil, Science))--University, of, the, Free, State,, 1971"]]
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  • 颁布单位:[University of the Free State] |  颁布时间:1971 |  实施时间:1971 |  学科分类:[["Soils, --, South, Africa","Soils, --, Orange, River","Soils, and, nutrition, --, South, Africa","Soils, and, nutrition, --, Orange, River","Dissertation, (M.Sc.Agric., (Soil, Science))--University, of, the, Free, State,, 1971"]]
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