The unit area value of double cropping, row cropping was 1.76 and 1.35 times of sole cropping.
复种、间作农田单位面积产值分别为单作一熟农田的1.76和1.35倍。
Zhongmian 16 is a new cotton variety with higher and constant yield, which is suitable for cotton-wheat double cropping system.
中棉16是适于麦棉两熟的丰产、稳产夏播棉新品种。
Tillage location test and its cooperative test in the wheat-maize double cropping field showed that the best time limit for applying disc plough was one or two years.
在小麦、玉米一年两熟制农田上，进行耕法定位及配合试验，试验表明，耙茬少耕的有效年限为1 ~ 2年。
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