Chapter 3 Cropping system in China (2)作物组成与布局 粮食作物 经济作物 其他作物 Homework 3: crop composition and distribution in China during 1999-2000 2021/2/22 Assessment of Climate/Change Impacts 7 of xChapter 3 2021/2/22 Assessment of Climate/Change Impacts 7 of x Cropping system in China （2）作物组成与布局 粮食作物 经济作物 其他作物 Homework 3: crop composition and distribution in China during 1999-2000