Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit: Papers · Exposés · Referate Presented at the 2nd International Conference held by IFOAM, Montreal, October 1–5 1978 / Exposés · Papers · Referate Présentés à la 3ème Conférence internationale organisée par IFOAM, Bruxelles, du 3 au 5 septembre, 1980
Stuart Hill · Pierre Ott
Dec 2013 · Birkhäuser
Ebook
365
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