Quantitative Evaluation of Climatic Resource Use Efficiency under Different Cropping Patterns in Dry Area Northwest China———Make Tianshui City as an Example
XINJi-wu, PUJin-yong, MAPeng-li
ACTA AGRICULTURAE BOREALI-SINICA . 2007, (S1): 156 -159 .  DOI: 10.7668/hbnxb.2007.S1.038