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Description: An Orthic Brown silt-loam Chernozemic soil near Swift Current, Saskatchewan, was subsoiled with a Paraplow to a depth of 350 mm prior to seeding alfalfa. Snowmelt infiltration through silty soils often improves following subsoiling, especially if the technique is coupled with practices to augment the snowcover. The subsoiling treatment followed a split-plot design superimposed on a randomized-block experiment with three alfalfa varieties (Rangelander, Beaver, and Angus) grown in an open field and within a grass windbreak system. Double rows of tall wheatgrass (Thinopyrum ponticum), averaging 1.2 m in height and spaced on 15.2-m centres, formed vegetative windbreaks designed to enhance snowcovers and moderate growingseason evapotranspiration. Snowcover water equivalents, spring soil water contents, and forage production from all the alfalfa varieties were greater in the windbreak shelter than in the open field. Hay-crop yields and soil water reserves were not significantly improved by subsoiling during any of the five production years following treatment either within or outside the wind shelter. Therefore, Paraplow subsoiling to improve infiltration is not recommended for dryland alfalfa grown on Orthic Brown Chernozemic soils of silt-loam texture in southern Saskatchewan.

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Citation: H. Sleppuhn, J. Waddington and B.G. McConkey 1995. SUBSOILING TO IMPROVE SNOWMELT INFILTRATION AND ALFALFA YIELDS WITHIN TALL WHEATGRASS WINDBREAKS. Canadian Agricultural Engineering 37(4):261-268.
Volume: 37
Issue: 4
Pages -
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Date: 1995
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Type: Text.Article
Format: PDF
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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