A MODULATED SOIL MOISTURE BUDGET

R. M. HOLMES Field Husbandry, Soils and Agricultural Engineering Division, Experimental Farms Service, Canada Department of Agriculture, Ottawa

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G. W. ROBERTSON Department of Transport, seconded to Field Husbandry, Soils and Agricultural Engineering Division, Experimental Farms Service, Canada Department of Agriculture, Ottawa

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Abstract

Most meteorological soil moisture budgets do not account for soil moisture stress changes in the drying cycle or for changes in ground cover or expanding root system. A simple modulated technique is described which considers these factors. Soil moisture stress determined by this technique has a significantly higher correlation with wheat yield than does moisture stress determined by a common method.

Abstract

Most meteorological soil moisture budgets do not account for soil moisture stress changes in the drying cycle or for changes in ground cover or expanding root system. A simple modulated technique is described which considers these factors. Soil moisture stress determined by this technique has a significantly higher correlation with wheat yield than does moisture stress determined by a common method.

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