Exploration of the Heat-effect for One Film in Dry Farming. Fields of Wheat and Corn

The heat efficiency of one film in dry farming fields of wheat and corn is studied. It suggests that with the application of this plastic film,the soiltemperature could increase about 2-6℃ thus provided a favorable condition to the growth of winter-wheat .with a heat efficiency of 0. 997.Compared with that of single croping the heat efficiency has been raised by 24%-40%. And therefore one crop a year became two crOP a year. Per mu yield is about 440-610kg and compared with that of single croping it increased by 20%-80%.

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