Authors: Douglas, Esther And Edward Mckyes
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Published in: CBE Journal » CBE Journal Volume 25 (1983)

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Description: The influence of tillage methods on crop growth and yields is manifested through changes in the soil structure and soil moisture depletion patterns during the growing season. Mechanical impedance to root growth and the soil water stresses developed in the root zone, as a consequence of the differences in bulk density in the topsoil layer, affect the density and the depth of the rooting systems of plants, and therefore the amount of soil water used by crops (Stibbe and Hadas 1977 Burnett and Hauser 1967 Lowry et al. 1970). Crop growth and yield are influenced directly by the factors contributing to the plant physical environment such as solar radiation water, nutrients, oxygen, temperature andC02levels. In the case of water, crop yields are directly proportional to the cumulative transpiration, the coefficient depending on the latitude and atmospheric conditions (Standhill 1960 Viets 1962). The effects of other limiting factors on potential growth and yield have been formulated by Rabinowitch (1951), and later by Visser (1969), and were developed quantitatively by Thornley (1976). Field tests of such effects were carried out by some investigators, such as Sojka et al. (1972). Further information concerning the effects of soil compaction and tillage methods on the stresses due to limiting growth factors in the root zone is required in order to assess appropriate land management practices directed to controlling the limits to crop yields. With this in mind, field experiments were con ducted to examine the interactions of the stresses created by these limiting factors and their effect on the growth of silage corn, as well as their ultimate effects on dry matter yield.

Keywords: tillage practices related to limiting plant growth factors and crop yields
Citation: Douglas, Esther and Edward McKyes 1983. TILLAGE PRACTICES RELATED TO LIMITING PLANT GROWTH FACTORS AND CROP YIELDS. Canadian Agricultural Engineering 25(1):47-56.
Volume: 25
Issue: 1
Pages 47 - 56
Date: 1983
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Coverage: Canada
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