This research is based on the implement of tillage and no-tillage farming with straw mulching,plastic film mulching,straw and plastic film mulching or without mulching to study the changes of spring maize yield and soil fertility.The result shows: On the basis of tillage without mulching spring maize yield is 6 212.75 kg/hm2,straw mulching increases yield by 45.67% compared with no mulching,plastic film mulching increases yield by 47.24%,straw and plastic film mulching increases yield by 73.24%;On the basis...
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