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。
In the model, the leaf area index (LAI), crop coefficients, and root penetration and distribution were simulated for the winter wheat and summer corn double cropping system.
模型对冬小麦—夏玉米轮作体系作物叶面积指数、作物系数、根系生长与分布进行了模拟。
It was significant to study the nitrogen and phosphorus losses from surface runoff in double cropping rice filed for guiding the rational fertilizer and protecting water environment.
研究双季稻田不同施肥量处理的氮磷降雨径流损失规律，对于指导双季稻合理施肥、保护水环境具有重要的现实意义。
We test the algorithm performance in the cases of single watermark, double watermarks and multi watermarks when different distortions such as JPEG compression, image resizing and cropping are applied.
该文就单水印，双水印以及多水印情形进行了仿真并进行JPEG压缩、图像缩放、剪切等失真测试。
We test the algorithm performance in the cases of single watermark, double watermarks and multi watermarks when different distortions such as JPEG compression, image resizing and cropping are applied.
该文就单水印，双水印以及多水印情形进行了仿真并进行JPEG压缩、图像缩放、剪切等失真测试。
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