The suitable planting density and time of sowing are favor of optimum use of soil water and improving water use efficiency, and make potato increasing its output.
适宜播种密度和播期有利于土壤水分的优化利用和水分利用效率的提高，可促进旱地马铃薯增产。
Influence of variety, density and sowing time on radish yield was studied utilizing orthogonal test.
采用正交试验设计，研究萝卜不同品种、密度、播期对产量的影响。
ObjectiveTo research the influence of sowing time , planting density and plowing depth to the yield and quality of Cynanchum paniculatum (Bge. ) Kitag.
目的考查播种期，种植密度及耕地深度对徐长卿产量和质量的影响。
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