SimPLE.ca: Simulator of productivity loss due to erosion for Canada.

Bremer, E., Greer, K.J., Black, M., Townley-Smith, L., Malhi, S.S., Izaurralde, R.C., and Larney, F.J. (2008). "SimPLE.ca: Simulator of productivity loss due to erosion for Canada.", Canadian Journal of Soil Science, 88(3), pp. 365-376. doi : 10.4141/CJSS07066  Access to full text

Abstract

Robust and practical estimates of the impact of soil erosion on crop productivity are essential for developing and implementing appropriate solutions for soil erosion on agricultural land. The objective of this study was to develop a simple model which captured the most important relationships between topsoil erosion and productivity loss for major agricultural regions of Canada. The model was developed for spring wheat (Triticum aestivum L.) and corn (Zea mays L.). Using annual time steps, maximum crop yields were reduced by soil erosion due to losses in available water-holding capacity, N-mineralization potential and available P. Using minimal input data, the model accounted for 56% of the variation in relative yields (fraction of non- eroded controls) determined in field studies using desurfacing or comparison plot methods.

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