grain density [感光] [物] 颗粒密度 ; 粒子密度 ; 晶粒密度 ; 矿粒密度
formation grain density 地层颗粒密度
bulk density of grain [粮食] 粮堆密度
columnar aerosol grain density 粒子密度
mass density of grain 粮食质量密度
density of grain setting 禾谷类穗上着粒密度
rock grain density 岩石颗粒密度
density-modified grain flow 变密度颗粒流
Second-degree polynomials equation of maize(Zea Mays L. ) grain yield with both planting density and nitrogen fertilization was established by means of regression analysis.
本文从不同种植密度和施氮量对玉米籽粒产量的影响，建立了二次多项式回归方程。
In physical and mechanical indexes, the basic density, air-dried density, compression strength parallel to grain, MOR, MOE and toughness of mature wood are higher than that of juvenile wood.
在物理力学性质指标中成熟材的基本密度、气干密度、顺纹抗压强度、抗弯强度、抗弯弹性模量及冲击韧性高于幼龄材；
Spikelet density is an important trait related with panicle number, spikelet number and grain weight.
水稻小穗着粒密度是一个重要的农艺性状，其与单株穗数、小穗数和粒重等有密切的联系。
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