The yieldunit area can be increased after rational stand transformation and tending management, farmers income raised.
通过合理的林分改造及抚育管理，可以提高单位面积的产量，增加林农的收入。
2
We must do everything to raise the per-unityield.
我们要千方百计提高单位面积产量。
3
We must protect primary farmland, keep the area sown to grain stable, improve the structure of grain varieties grown and increase the per unit area yield of grain.