residue cover of soil surface (%)

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Presentation transcript:

residue cover of soil surface (%) 45 20 35 30 25 15 10 5 40 FP FC soil loss (tons/acre) FP NT FC NT 0 10 20 30 40 50 60 70 residue cover of soil surface (%) This figure shows that: • surface residue reduces erosion, • reduced tillage (chisel and no-till) leaves more residue and results in less erosion than plowing, and • corn (circled) returns more residue than soybeans. Figure 16.2. Soil erosion dramatically decreases with increasing surface cover. Note: FP = fall plow, FC = fall chisel, NT = no-till; circles = corn, no circles = soybeans. Modified from Manuring (1979).

Figure 16.7. Roller-crimper creates a weed-suppressing cover-crop mat through which it is possible to plant seeds or transplants. Here cotton is being planted behind rye that has been traveled over by the roller-crimper. Photo by Jeff Mitchell.