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Effect of direct nitrogen and potassium and residual phosphorus fertilizers on soil chemical properties, microbial components and maize yield under long-term crop rotation |
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| Authors: | A. Belay A. Claassens F. Wehner |
| Affiliation: | Department of Plant Production and Soil Science, University of Pretoria, Pretoria 0002, South Africa, Department of Microbiology and Plant Pathology, University of Pretoria, Pretoria 0002, South Africa, |
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