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  • Soil fertility in organic systems : a guide for gardeners and small acreage farmers 

    Collins, Doug; Miles, Carol A.; Cogger, Craig George, 1950-; Koenig, Richard T., 1965- (Pullman, Washington : Washington State University. Extension., 2013-07)
    This publication discusses the many types of fertilizers and soil amendments available for organic plant production. Fertilizer formulations, nutrient availability, and application practices for common organic products are ...