搜索结果: 1-9 共查到“农业生物物理学 density”相关记录9条 . 查询时间(0.076 秒)
Changes in soil organic matter, bulk density and tensile strength of aggregatesafter percolation in soils after conservation and conventional tillage
percolation process carbon distribution aggregates strength
font style='font-size:12px;'>
2008/11/26
The type of tillage in arable soils affects porosity of the soil and in consequence the hydraulic conductivity. The accessibility and mobility of organic carbon in arable soils can differ depending on...
Comparison of two- and three-electrode systems in measurements of potential oxygen flux density in soil*
soil aeration soil oxygen flux ODR OFD
font style='font-size:12px;'>
2008/11/24
This paper presents a comparison of the results of potential flux of oxygen in soil, determined by the voltammetric method, OFD, with the use of a three-electrode set of electrodes in the system of po...
Chronovoltammetric determination of oxygen flux density in the soil
oxygen diffusion rate determination ODR of soil soil aeration oxygen flux density
font style='font-size:12px;'>
2008/11/21
A chronovoltammetric method for the determination of oxygen flux density (OFD) in the soil is proposed. The method is based on the current-potential relationship recorded on a platinum indicator elect...
Determination of the background current in electrochemical measurements of oxygen flux density in organic soils
oxygen flux density in the soil measurements ODR OFD
font style='font-size:12px;'>
2008/11/21
The aims of this paper were: to state if the soluble substances contained in organic or organic-mineral soils can reduce in the same range of potentials as oxygen, falsifying (revaluing) the results ...
Effect of penetration resistance, bulk density and moisture content of soil on selected yield components of winter triticale in relation to method of cultivation
penetration resistance moisture soil bulk density yield components
font style='font-size:12px;'>
2008/11/20
The influence of penetration resistance, bulk density and moisture content of soil on winter triticale crop yield was investigated. The crops were grown on land that had not been cultivated for severa...
Estimating trafficability of three Nigerian agricultural soils from shear strength-density-moisture relationsEstimating trafficability of three Nigerian agricultural soils from shear strength-density-moisture relations
compactive efforts trafficability moisture content shear strength dry density
font style='font-size:12px;'>
2008/11/19
The dry density and shear strength of Iwo (Alfisols), Egbeda (Entisols) and Ondo (Ultisols) soil series in south-western Nigeria were measured at different compaction efforts and moisture contents. Re...
TDR and low-frequency measurements for continuous monitoring of moisture and density in a snow pack
snow density moisture time domain reflectometry
font style='font-size:12px;'>
2008/11/12
An in-situ sensor for the simultaneous measurement of density and liquid water content of snow is presented in this paper. The system consists of radio frequency transmission lines of up to 25 m lengt...
Soil tensile strength as affected by time, water content and bulk density
soil tensile strength Brazilian test age-hardening
font style='font-size:12px;'>
2008/11/11
We investigated the effect of soil water conditions and soil compaction on the age-hardening process of loamy sand and silty loamy sand in relation to the tensile strength. Soil samples from Germany (...
The effect of sowing density on the lodging and mechanical properties of rape stalks
rigidity dynamic shearing energy stem cross section area
font style='font-size:12px;'>
2008/11/10
In this study, the mechanical properties of rape stalks are expressed by means of stalk rigidity determined in bending, and by means of dynamic shearing energy per unit of stalk cross section area. Ex...