soil bulk density 土壤颗粒密度相关短语 Floex (颗粒剂载体) 佛斯 interfluent flow (不同密度的) 层间水流 kerosene method (测密度用) 煤油法 kilderkin (颗粒状物容积单位) 大桶 Gqudin's equation (测定颗粒大小用) 高丁方程式 pycnocline (密度梯度) 密度跃层 Bouyocos hydrometer (用于测定悬浮液固体颗粒...
The objective of this study is to develop a simple and accurate TDR equation to measure soil bulk density. Laboratory measurements of soils with different textures were carried out to establish the TDRbulk density equation, and then the performance of this improved equation was evaluated with ...
The bulk density equation is: {eq}\gamma =\frac{m_d}{v_t} {/eq} substitute values: {eq}\gamma =\frac{0.59}{5.2*10^{-3}}=11*10^{1} \frac{lb}{ft^{3}} {/eq} and that is 110 pcf or 110 pounds per cubic foot dry soil bulk density. Example 2: A large sample of soil...
The PTF1 equation is recommended when clay content data are available, but considering that they are scarce for organic soils, the PTF2, Hollis, and Honeysett equations are the most suitable because they use TOC as a predictor variable. Considering the particular characteristics of organic soils ...
The bulk density of a soil changes with natural and artificial processes in a field. The larger the bulk density ρb of the soil, the larger the air entry suction he and the smaller the hydraulic conductivity Ks. Although both the Kozeny-Carman equation, based on Poiseuille's law, and Cam...
Of these horizons, the particle-size distribution in nine fractions, the dry bulk density, and the carbon content were determined as well. The Van Genuchten equation (1980), reduced to four parameters on the basis of a model comparison technique, was fitted through the measured MRCs using ...
4) Soil water flow equation for changing bulk density 变容重土壤水分运动方程 5) soil dry bulk density 土壤干容重 1. The results indicated that tillage soil water infiltration capacity has larger changes in agricultural production cycle,with the change of soil water content from high to low wa...
Spatial variability of bulk density and soil water in a small catchment of the Loess Plateau; 黄土高原小流域土壤容重及水分空间变异特征3) soil-water movement 土壤水分运动 1. In order to acquire more accuracy of numerical simulation of soil water movement under subsurface irrigation with porous ...
The thermo-TDR (time domain reflectometry) technique has been applied for measuring soil bulk density (ρb) in-situ. However, the accuracy of thermo-TDR measured ρbdata, as influenced by plant roots, has not been studied. In this study, we applied the extended de Vries heat capacity model...
Azizi Agh GHale B .2001. Effects of Three Kinds of Organic Matter on Maximum Dry Bulk Density of Soil (MDBP) and the corresponding critical moisture content (CMC) during compression. Science and Technology of Agriculture and Natural Resources 5: 49-63....