By measurement of underground biomass and observation and rating of turf density and disease resistance of cool season turf mixture (tall fescue+Kentucky bluegrass), the distribution and seasonal change of turfgrass underground biomass was studied.
该研究通过对冷季型混播草坪 (高羊茅 +草地早熟禾 )地下生物量的测定 ,结合草坪密度和抗病性的观测 ,研究了草坪地下生物量的空间分布和季节变化 ,同时对草坪地下生物量与草坪密度变化和抗病性的关系作了一些探讨 。
Succession of shrubby grassland of rocky mountain and its improvement and utilization in Karst areas;
岩溶地区石山灌草丛草地演替及其培育和利用
To understand the growth strategies of clonal ramets from Rhus typhina,an exotic tree species,in the shrub-grassland of the hilly area of the Taihang Mountains in north China,a relevant analysis was conducted on the heterogeneous growth characteristics of R.
探讨了太行山低山丘陵区次生疏灌草丛火炬树Rhus typhina克隆分株的生长策略。
Sometimes the preliminary step must be taken of reducing weed population before fertilizing.
有时候，在施肥之前，必须采取减少杂草密度的预备性步骤。
a wanton growth of weeds
杂草的丛生 [茂密]
The Effects of Plant Densities on the Development Medicago Varia Martin.cv. Caoyuan No.3;
种植密度对草原3号杂花苜蓿生长发育的影响
medium density hay press
中等密度干草压捆机
Research on Low-Density Erasure Codes and Trellis Complexity;
低密度纠删码和网格图复杂度的研究
The image is processed in the computer and the result is the density of weed in the image, which control the spraying of herbicide.
采集的图像在计算机中进行处理，处理的结果是图像中杂草的分布密度，以此来控制除草剂的喷洒。
Study on Stress Relaxation of Hay During Baling Under High Density
牧草在高密度压捆时的应力松弛研究
The eye is a complex and highly developed photosensitive organ.
眼是复杂而且高度精密的感光器官。
Enhancement of Critical Current Density in MgB_2 Bulk Superconductors by Chemical Doping;
高临界电流密度的MgB_2块材的掺杂研究
Enhancement of Critical Current Density in MgB_2 Bulk Superconductors by Chemical Doping
高临界电流密度的MgB_2块材掺杂研究
Detecting Dynamic Complexity of Rat Population in Ecological Systems
生态系统中鼠群密度动态复杂性研究
Calculation Based upon the Function Theory in La-doping CeO_2 Crystal
La掺杂CeO_2电子结构的密度泛函计算
A preliminary study on planting density and fertilizer rate of rape cultivar"Heza 7"
油菜“核杂7号”种植密度和施肥量研究
A study on La(Ⅲ) doped anatase titanium dioxide by density function theory
La(Ⅲ)掺杂TiO_2密度泛函理论的研究
Effects of different afforestation density on growth of Acacia mangium×A. auriculaef Ormis
不同造林密度对杂交相思生长的影响
The Suitable Planting Density of Qianxiangyou 302 (a Hybrid Aromatic Rice Variety)
杂交香稻黔香优302栽插密度初探
Effect of Different Grazing Intensity on the Spring and Autumn Meadow Steppe of the Stipa Capillata+herbage;
不同放牧强度对针茅+杂类草草甸草原春秋场的影响
However, The Mongolian pine height, density, DBH and the height and covering degree of grass under forest highly was not remarkable relevance with bird density, respectively.
树的高度、密度、胸径、森林下草的高度,草的盖度与鸟类密度相关不显著。