Download e-book for kindle: Biological Husbandry. A Scientific Approach to Organic by B. Stonehouse

By B. Stonehouse

ISBN-10: 040810726X

ISBN-13: 9780408107266

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Example text

In the second case the role of earthworms, incorporating organic residues into their casts, could enhance both the organic matter and rooting effect by encouraging the roots to branch into the casts that they form. Land management unfavourable to burrowing earthworms Whichever hypothesis explains how earthworms, in combination with organic matter and plant roots, achieve the water-stable granulation of loam soils, the activities of burrowing earthworms are essential. Therefore, any form of soil management that neglects their welfare should be avoided, including those listed below.

Wright, 1977; McEwen and Stephenson, 1979). Conclusion There seems to be cause for concern over the extent to which some farmers and horticulturalists are conditioned to systems of intensive production, that put at risk the natural mechanisms enabling plants to exploit their environment to the full. Such growers could be in a vicious circle of increasing dependence on the expensive products of the agrochemical industry unless they rethink their management procedures in the light of the benefits that can be acquired by fostering deep exploitive rooting.

The Formation of Vegetable Mould Through the Action of Worms, with Observations on Their Habits. London; Murray DREW, M. C. (1975). Comparison of the effects of a localized supply of phosphate, nitrate, ammonium and potassium on the growth of the seminal root system, and the shoot, in barley. New Phytologist, 75, 479490 EDWARDS, C. A. and LOFTY, J. R. (1977). Biology of Earthworms, 2nd edn. London; Chapman and Hall GREENWOOD, D. J. (1969). Effect of oxygen distribution in the soil on plant growth.

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Biological Husbandry. A Scientific Approach to Organic Farming by B. Stonehouse


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