A Study on Raising the Coefficient of Precipitation Utilization of the Staple Crops on the Bashang Highland in the Nothern Part of Hebei Province
YuLing, LinYan, ZhangNiansheng
ACTA AGRICULTURAE BOREALI-SINICA . 1991, (S1): 89 -95 .  DOI: 10.3321/j.issn:1000-7091.1991.z1.016