production per unit area

基本解释

The thinning intensity and seed production per unit area wereclosely interrelated;
疏伐强度与母树林单位面积产种量相关密切；
Ensure national food security, and continually enhance the food production per unit area yield, quality and efficiency;
确保国家粮食安全，不断提高粮食生产的单产、品质和效益；
China has been the world's second largest corn producer since 1996, corn production and yield per unit area than wheat ranking cereal crops second place.
我国是世界上第二大玉米生产国，自1996年后，玉米总产量和单位面积产量超过小麦，居禾谷类作物的第二位。