LIBROS DEL AUTOR: asfaw belay

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  • Direct & Residual Fertilizer Impacts on Soil Quality and Productivity
    Asfaw Belay
    Long-term agricultural field experiments, especially those that are 50 years or older, are relatively rare globally. A significant majority of them are also located in Europe and North America, with only a handful in Africa. One of the latter is the Pretoria long-term crop rotation and fertilization experiment that has been ongoing for over 60 years, hence the oldest of its kin...
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