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Crop Residue Decomposition in No-Tillage Small-Grain Fields

^a USDA–ARS, 1420 Experiment Station Rd., Watkinsville, GA 30677 USA
^b USDA–ARS, P.O. Drawer 10, Bushland, TX 79012 USA

View larger version (27K): [in a new window]   Fig. 1 Decomposition of barley and winter wheat residue, shown as mass vs. days after harvest (a and d); normalized mass (M/M0) vs. days after harvest (b and e); and normalized mass vs. decomposition days (c and f). Symbols are means and lines represent plus or minus one SE. For a, b, d, and e there are nine observations per mean (three irrigation x three replications), and for c and f there are three observations per mean (replications)

View larger version (17K): [in a new window]   Fig. 2 Decomposition coefficients (k) of barley, oat, spring wheat, and winter wheat as a function of initial biomass