Libri di organic wastes as fertilizer
3 libri in questo genere
Organic materials and soil productivity in the Near East
FAO/SIDA Workshop on the Use of Organic Materials for Improving Soil Productivity in the Near East (1978 Alexandria, Egypt)
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Manures: how to make and how to use them
Frank W. Sempers
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The importance of biological agriculture in a world of diminishing resources
Hartmut Vogtmann
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