The effect of density of winter wheat basic seedling on grain yield in condition of chemical manipulation was studied with semi-winter variety Jihe 02.
用半冬性品种济核02为供试材料，研究了化学控制条件下小麦基本苗对产量的效应。
We also assemble a set of permeability testing equipment, by which we study on the effect of density, thickness and air pressure on the relative permeability.
并利用自行组装的测试设备研究了柔性石墨板密度、厚度以及空气压力差对相对透气系数的影响。
The results showed as follows. The effect of density and nitrogen on effective flower numbers reached very significant level, and their interaction reached significant level.
结果表明，密度和施氮量对有效花朵数的影响达到极显著水平，其交互作用效应也达到显著水平。
The computation results show that the effect of density to laminar bottom layer in vertical pipeline is obvious and is bigger than that of viscosity, which can not be ignored.
研究结果表明，密度对竖直管道顺序输送过程中层流底层的影响比较明显，并且大于粘度影响，不可忽略。
The computation results showed that the effect of density differences when velocity of flow was small was obvious to the boundary of laminar flow in the elevation difference pipeline.
结果表明，在大落差管道，流速不大的情况下，密度差对层流边界层影响比较明显。
Plants, especially in population of two years, have bigger bodies in low and middle densities than that in high densities in field. It's the effect of density dependence.
人工种群植株不同密度间个体生长差异显著，尤其是人工二年生种群植株中、低密度区比高密度区个体生长得较大，体现了密度制约的效应。
Plants, especially in population of two years, have bigger bodies in low and middle densities than that in high densities in field. It's the effect of density dependence.
人工种群植株不同密度间个体生长差异显著，尤其是人工二年生种群植株中、低密度区比高密度区个体生长得较大，体现了密度制约的效应。
应用推荐