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Dynamic Cropping Systems for Sustainable Crop Production in the Northern Great Plains

USDA-ARS, P.O. Box 459, Mandan, ND 58554

View larger version (49K): [in this window] [in a new window]   Fig. 1. A crop x crop residue matrix used to evaluate the influences of crop sequence on crop production. During the first year, 10 crops (numbered 1 through 10) were no-till seeded into a uniform crop residue. During the second year, the same 10 crops were no-till seeded perpendicular over the residue of the previous year's crops. Individual plot numbers are assigned for each experimental unit in the replication.

View larger version (39K): [in this window] [in a new window]   Fig. 2. Residue production in 2002 before matrix crop production in 2003 (Site 1) and residue production in 2003 before matrix crop production in 2004 (Site 2) at Mandan, ND.

View larger version (29K): [in this window] [in a new window]   Fig. 3. Monthly growing season precipitation in 2002, 2003, 2004, and 1914 to 2004 at Mandan, ND.

View larger version (48K): [in this window] [in a new window]   Fig. 4. Mean monthly growing season temperatures in 2003, 2004, and 1915–2004 at Mandan, ND.