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- [1] The Possible Effect of Climate Warming on Northern Limits of Cropping System and Crop Yield in China[J]. YANG Xiao-guang1, LIU Zhi-juan1 and CHEN Fu2 1 College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, P.R.China 2 College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, P.R.China.Agricultural Sciences in China. 2011(04)