论文部分内容阅读
世界大米、小麦、玉米生产供需变化品种年份面积(103hm2)单产量(t/hm2)生产量(103t)贸易量(103t)消费量(103t)库存量(103t)大米19901466992.40352181114083476575859019911473902...
World rice, wheat and corn production supply and demand changes Variety Year Area (103hm2) Yield per unit (t/hm2) Production volume (103t) Trade volume (103t) Consumption (103t) Inventories (103t) Rice 19901466992.40352181114083476575859019911473902...