Temporal and Spatial Variations of Agro-meteorological Disasters of Main Crops in China in a Changing Climate (Ⅱ):Drought of Cereal Crops in Northwest China
HE Bin, LIU Zhi-juan, YANG Xiao-guang, SUN Shuang
Chinese Journal of Agrometeorology . 2017, (01): 31 -41 .  DOI: 10.3969/j.issn.1000-6362.2017.01.004