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Effect of cropping frequency, wheat classes, and flexible rotations on yield, production, and nitrogen economy in a Brown Chernozem

Campbell, C.A.; Zentner, R.P.; Selles, F.; Lemke, R.; Jefferson, P.G.; McConkey, B.G.; Gan, Y. (2003-02-18)

Producers in the semiarid Canadian prairies frequently summerfallow (F) to conserve water, control weeds, and to maximize soil N reserves; however, this practice often results in soil degradation. A crop rotation experiment ...