黄河三角洲地区苜蓿收获时期生态气候适宜性评价

牛建忠, 史德宽

Evaluation on the Ecoclimatic Suitability for Alfalfa Harvested Period in the Region of Yellow River Delta

Niu Jianzhong, Shi Dekuan

. 1998, (2): 139 -146 . DOI: 10.11733/j.issn.1007-0435.1998.02.009