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Title:: Quantitative Evaluation and Analysis on Different Cropping Patterns of Soybean in Northwest Irrigation Districts along Yellow River

Abstract:: ?In order to quantitatively evaluate the benefits of different cropping patterns of soybean in Northwest irrigation districts along Yellow river, we adopted the concept of land equivalent ratio, yield equivalent and value of output equivalent, and analyzed the cropping patterns of early potato/soybean, wheat/soybean, corn//soybean, oil flax/soybean and pea/soybean. Compared with monoculture, land use efficiency of five patterns raised by 54%, 34%, 52%, 52% and 66%, unit area yield increased by 39%, 28%, 48%, 55% and 64%, unit area output value enhanced by 43%, 31%, 54%, 53% and 69%, respectively. The benefits of five cropping patterns in descending order were early potato/soybean, corn//soybean, pea/soybean, wheat/soybean and oil flax/soybean, the profit was 20 033.48, 11 786.85, 11 312.02, 9 941.03 and 9 748.05 yuan·ha^-1, respectively.