EFFECTS OF AGRICULTURAL LAND USE ON POTENTIAL SHEET EROSION LOSSES IN SOUTHERN ONTARIO

Autor:	W. T. Dickinson, G. J. Wall, L. J. P. Van Vliet
Rok vydání:	1976
Předmět:	Universal Soil Loss Equation Agronomy Agricultural land Agriculture business.industry Cash crop Erosion Soil Science Environmental science Sheet erosion Livestock business Cropping
Zdroj:	Canadian Journal of Soil Science. 56:443-451
ISSN:	1918-1841 0008-4271
DOI:	10.4141/cjss76-053
Popis:	Potential sheet erosion losses from 13 agricultural watersheds were investigated to assess the effects of agricultural land use on soil erosion levels. The agricultural watersheds, ranging in size from 19 to 54 km2, were representative of the predominant livestock and cropping management systems in the major physiographic and climatic regions of Southern Ontario. Average annual sheet erosion losses were estimated on a field basis using the universal soil loss equation. Rainfall intensity and soil and topographic variability were considered in deriving mean annual soil losses for a range of field crops. Crops yielding the highest annual sheet erosion loss estimates were row crops, such as horticultural cash crops (9.1 ton/ha/yr), beans (7.6 ton/ha/yr), and continuous corn (6.7 ton/ha/yr). Erosion losses from crops in rotations with grasses or legumes (corn, small grains, meadow) and from tobacco were determined to be approximately one half of values obtained for continuous row cropping systems. Lowest sheet erosion losses occurred on permanent pasture and woodlands (
Databáze:	OpenAIRE
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