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Potato Rotation Study - Carberry, Manitoba (1997-2010).

Mohr, R.M., Irvine, R.B., Khakbazan, M., McLaren, D.L., Monreal, M.A., Moulin, A.P., Tomasiewicz, D.J., Volkmar, K.M., and Derksen, D.A. (2012). "Potato Rotation Study - Carberry, Manitoba (1997-2010).", Prairie Soils and Crops, 5, pp. 36-41.

Abstract

During the 1990’s, Manitoba’s processing potato industry experienced a period of unprecedented expansion. The Potato Rotation Study at Carberry, Manitoba was initiated to identify economically and environmentally sustainable rotations that optimized crop yield and quality, while maintaining or enhancing soil quality. Six potato rotations were established in 1998: 1) potato - wheat (P-W); 2) potato - canola (P-C); 3) potato - canola - wheat (P-C-W); 4) potato - oat - wheat (P-O-W); 5) potato - wheat - canola - wheat (P-W-C-W); 6) potato – canola (underseeded to alfalfa) - alfalfa - alfalfa (P-C-A-A). Declines in potato yield were observed in the 2-year rotations in 2007 and continued through 2010. Potato yield declines were associated with high levels of potato early dying (PED) in the two year rotations but these yield declines were not seen in the longer rotations. Yield declines in the short rotations were not associated with increased weed competition or declines in soil quality.

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