The effects of plastic-sheet-covered cultivation, ridge culture, fertilization quantity and planting density on the yield of spring potato were studied.
研究了覆膜和垄作栽培以及施肥量和种植密度对春马铃薯产量的影响。
2
Photosynthesis characteristic of maize were improved by planting double line at one width ridge.
大垄双行种植的玉米群体冠层内，叶片光合特性也有不同程度的改善。
3
Planting sand ridge shape, there are gaps oxidation silicon blocking performance. Used for automobile, electronics paint surface polishing.