资源 标记: Fertilizers Handbooks And Manuals

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  1. Soils, crops, and fertilizer use

    1986-01-10 This field manual for development workers is desgned for those working with limited resource farmers and gardeners. It is well suited as a high school or university textbook. 338 pages, illustrations
    Fertilizers-Handbo... Subsistence Farming

  2. The Farmer's fertilizer handbook: how to make your own NPK recommendation-- and make them pay

    1986-01-01
    Fertilizers-Handbo...