An optimum planting density must be employed to get a high yield, depending upon soil condition, varietal tillering ability, fertilizer level, number of plants per hill, and planting season.
获得高产必须采用最适植株密度，视土壤条件、品种分蘖力、肥力水平、每蔸苗数和播种季节而定。
The effects of planting density and fertilizer level on the high-oil soybean quality traits were studied by the means of using a split plot experiment with two factors.
采用二因素裂区试验研究了不同种植密度和施肥水平对高油大豆品质性状的影响。
The high density planting affecting soil nutrinent environment causes nutrinent limitation from many factors and many stairs.
密植对土壤养分环境的压力，造成多因子、多梯度的养分限制因子；
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