河南省棉花产量的灰色预测及灾变年份预报

王桂芳, 张耀增, 尚泓泉

Grey System Forecast of Cotton Yield and Calamity Year in Henan Province

Wang Guifang, Zhang Yaozeng, Shang Hongquan

华北农学报 . 1994, (S1): 128 -132 . DOI: 10.3321/j.issn:1000-7091.1994.z1.027