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３年多点田间试验结果表明，旱地玉米免耕秸秆覆盖适宜的覆盖量为５００～８００ｋｇ／亩；在亩产３００～５００ｋｇ的地块，其秸秆量就是适宜的覆盖量。
The result of field experiment in more than three years showed that the suitable coverage of no-tillage corn in dry land was 500 ~ 800kg / mu and that of straw in suitable land of 300 ~ 500kg per mu was suitable coverage.