搜索结果: 1-15 共查到“土壤学 Distribution”相关记录25条 . 查询时间(0.156 秒)
Evaluation of discrepancies in spatial distribution of rainfall erosivity in the Czech Republic caused by different approaches using GIS and geostatistical tools
covariate geostatistics R factor rainfall intensity rainfall total USLE/RUSLE-GIS method
2017/6/26
The study presents all approaches of rainfall erosivity factor (R) computation and estimation used in the Czech Republic (CR). A lot of distortions stem from the difference in erosive rainfall criteri...
Assessment of trace and heavy metal distribution by four sequential extraction procedures in a contaminated soil
fractionation metals mining activities pollution
2015/3/9
Four sequential extraction procedures (Sposito, Tessier, Silveira and Bureau Communautaire de Reference (BCR)) were used to evaluate the distribution of some metals (Fe, Cu, Cd and Zn) in a contaminat...
Effect of temperature on the distribution of polycyclic aromatic hydrocarbons in soil and sediment
sorption desorption thermodynamic parameters polycyclic aromatic hydrocarbons
2015/2/4
The knowledge of sorption-desorption processes of polycyclic aromatic hydrocarbons (PAHs) in natural solids is essential to predict the fate, transport, and environmental risks of these pollutants. In...
Molecular size distribution and hydrophilic and hydrophobic properties of humic acids isolated from forest soil
forest soil humic acids HPSEC hydrophobic fractions hydrophilic fractions
2015/1/30
The aim of the present paper was to determine hydrophilic and hydrophobic properties and the degree of polydispersity of humic acids depending on their degree of maturity and the properties of the pla...
Lead Distribution in Urban Soils: Relationship Between Lead Sources and Children's Blood Lead Levels
Lead Contamination Blood Lead Children
2015/1/16
The road we chose was definitely the one less traveled by and with the help of our
guiding angel, Hoda, this road has made all the difference.
It is a privilege to be your mother and to watch you ...
Simulating water distribution patterns for fixed spray plate sprinkler using the ballistic theory
ballistic model center-pivot kinetic energy losses
2014/10/28
Ballistic simulation of the spray sprinkler for self-propelled irrigation machines requires the incorporation of the effect of the jet impact with the deflecting plate. The kinetic energy losses produ...
Cropping frequency and N fertilizer effects on soil water distribution from spring to fall in the semiarid Canadian prairies
Fallow Frequency Water Use Plant Biomass Spring Wheat Soil Water
2013/3/4
In the semiarid Canadian prairies, water is the most limiting and nitrogen (N) the second most limiting factor influencing spring wheat (Triticum aestivum L.) production. The efficiency of water-and n...
Effects of different levels of compost application on amounts and distribution of organic nitrogen forms in soil particle size fractions subjected mainly to double cropping
Compost Application Upland and Paddy Fields Soil Organic N Forms Size Fractions
2013/3/4
Effects of different levels of compost application on the amounts and percentage distribution of organic N forms in whole soils and particle size fractions were investigated. Soil samples were collect...
Soil texture fractions and fractal dimension of particle size distribution as predictors of interrill erodibility
Erosion predictor fractal dimension
2011/6/29
Choosing a particular textural fraction as an erodibility predictor is often confusing because various fractions of soil particles have been introduced as erodibility index by many researchers.
Distribution of natural radionuclides in anthrosol-type soil
Distribution of natural radionuclides anthrosol-type soil
2010/10/29
Taking into account the importance of distribution and transfer of radionuclides in the soil-water-plant system, especially in agricultural fields, in this study, natural radionuclide determination in...
Soil texture fractions and fractal dimension of particle size distribution as predictors of interrill erodibility
Erosion predictor fractal dimension interrill erodibility soil texture
2011/3/22
Choosing a particular textural fraction as an erodibility predictor is often confusing because various fractions of soil particles have been introduced as erodibility index by many researchers. Recent...
Time-dependent changes in distribution patterns of soil bulk density and penetration resistance in a rangeland under overgrazing
Bulk density overgrazing penetration resistance rangeland soil compaction spatial variability
2011/3/29
High soil bulk density and penetration resistance as an indication of soil compaction affect soil infiltration and
runoff. Overgrazed rangelands are under severe erosion risk because of soil compacti...
Spatial and Temporal Distribution of Soil Water Content in Fields under Different Vegetation Conditions Based on TDR Measurements
electromagnetic wave Andisol multiple probes with different lengths
2009/9/10
TDR (Time-domain reflectometry) is an advanced method for monitoring the water content in fields.TDR measurements can provide accurate information about vegetation effects on both spatial and temporal...
Water-Extraction by Split-Roots of Sesbania and Pigeon Pea Exposed to Spatially Heterogeneous Distribution of Soil Water
ABA Deep root Drought stress Groundwater Root distribution Specific root length Stomatal behaviour Water logging
2009/7/24
Previous studies have suggested that the deep roots of sesbania (Sesbania sesban) function less efficiently in water acquisition than those of pigeon pea (Cajanus cajan) despite similar rooting depths...
Effect of Method of Nitrogen Fertilizer Application on Recovery Rate of Applied Nitrogen and its Distribution in the Rice Plant in a Cold Region
Fertilizer placement Labeled nitrogen (15N) Protein-content Recovery rate Rice plant
2009/7/8
To examine the effect of the method of nitrogen fertilizer application (incorporation into plow layer, surface layer application and side dressing) on the recovery rate of applied nitrogen and its di...
