Livres de organic wastes as fertilizer
3 livres dans ce genre
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)
Pas de note
Manures: how to make and how to use them
Frank W. Sempers
Pas de note
The importance of biological agriculture in a world of diminishing resources
Hartmut Vogtmann
Pas de note