This paper deliberated on the status of pollution brought by chemical fertilizer, pesticides and mulching plastic film, and according to each problem the corresponding treatments were put forward.
分析和探讨了化肥、农药及地膜对我国农田环境的污染状况，提出了控制农业自身污染的对策。
Technical economic evaluation on no-tillage with stalks mulching was made with comparative analysis method in this paper.
应用比较分析方法，对免耕整秸秆半覆盖技术进行了技术经济效果评价。
To attain such a goal, this paper concludes: Comparing the difference between those who adopt drop irrigation technology of water saving under mulching film and those who do not adopt;
为了达到这一目标，本研究主要内容包括：比较近三年农户采纳膜下滴灌节水技术与未采纳膜下滴灌节水技术之间的效率差别；
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