Download Basic Technics in Ecological Farming / Techniques de Base en by Stuart B. Hill (auth.), Stuart Hill, Pierre Ott (eds.) PDF

By Stuart B. Hill (auth.), Stuart Hill, Pierre Ott (eds.)

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Extra info for 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 Bodenfruchtbarkei

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David Vail and Michael Rozyne 34 On-Farm vs. Off-Farm Nutrient Sources In our examination of how "self-reliant" the sample farms are in building and maintaining soil fertility, we were surprised to find that most are not practicing the "closed nutrient cycle" agriculture (Tables 1, 2). In fact, two-thirds of the farms obtain half or more of their soil amendments from off the farm. Table 1. Source of Soil Amendments Extent of On-Farm Nutrient Sources Almost all Most - -Half --- No. 1i 31 Table 2.

We have designed a simple air-lift pumping system that circulates and aerates the water. USing the concept of biopurification, a closed-system salmon and trout hatchery has been designed and successfully tested in the greenhouse. Experience so far has led us to the tentative conclusion that it can be more efficient to raise both plants and fish in a single, solar-powered facility than to raise either separately. Soil Fertil ity Maximum use of natural, indigenous materials is also a goal of our work in outdoor food production.

USing the concept of biopurification, a closed-system salmon and trout hatchery has been designed and successfully tested in the greenhouse. Experience so far has led us to the tentative conclusion that it can be more efficient to raise both plants and fish in a single, solar-powered facility than to raise either separately. Soil Fertil ity Maximum use of natural, indigenous materials is also a goal of our work in outdoor food production. Long-range plans call for the study of cropping and management procedures that do not depend on manufactured inputs.

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