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.
要保护好基本农田，稳定粮食播种面积，优化粮食品种结构，着力提高粮食单产。
2
To test reliability of the simulated program, ventilation drying tests on maize and rice under certain drying conditions were conducted by using the grain ventilation unit.
为了验证模拟程序的可靠性，在一定干燥条件下利用自制的谷物通风干燥装置对玉米、稻谷做了通风干燥试验。
3
Grain orientation within the intertidal beach unit is characteristically more-or-less normal to the coastline.