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Wheat and Maize Yields in Response to Straw Management and Nitrogen under a Bed Planting System

^a CIMMYT, A.P. 6-641, Mexico D.F. 06600, Mexico
^b Univ. of Nebraska–Lincoln, 225 Keim Hall, Lincoln, NE 68583-0949 USA

View larger version (33K): [in a new window]   Fig. 1 Linear regressions of individual tillage–straw treatments of wheat (5 yr) and maize (4 yr) grain yields on environment mean yields each year at CIANO, Sonora, Mexico (1993–1997)

View larger version (31K): [in a new window]   Fig. 2 Linear regressions of individual N treatments of wheat (5 yr) and maize (4 yr) grain yields on environment mean yields each year at CIANO, Sonora, Mexico (1993–1997). Nitrogen rates indicated for maize were N treatments applied to previous wheat crop

View larger version (19K): [in a new window]   Fig. 3 Linear regressions of individual tillage–straw treatments of wheat grain yields on stress degree days (SDD) in 1997