The purpose of this study was to assess the transport of the herbicide bentazone [3-(1-methylethyl)-1H-2,1,3-benzothiadiazin-4(3H)one 2,2-dioxide] in three contrasting tile-drained cultivated field soils subject to otherwise similar experimental conditions. Observed drain discharge rates and chemical concentrations in the drainage water reflected the different transport processes at the three s...

The paper presents a detailed experimental investigation of particle breakage in three kinds loess, i.e., sandy silty loess and clayey loess. It is firstly found that can occur within oedometer test, which results better-graded soil at the end test. Initial stresses for both are less than 0.5 MPa, about 2 MPa relative (Br) used to evaluate degree, it all tested, Br increases with increasing loa...

The current study includes determination of the concentrations lead (Pb) in 18 specimen Kirkuk city soil (K). Inductively Coupled Plasma - Mass Spectrometry (ICP-MS) technology has been used analysis samples laboratories Acme company Canada. Results chemical clarified a rise average (26.11 ppm) compared with international (10 and uncontaminated ones (15 ppm), its surface depth (30.2ppm) lower d...

In earthquake engineering practice, the liquefaction potential of soils is commonly evaluated through simplified procedures. These approaches are suitable for sands with very low to no fines content, which have been traditionally thought be only liquefiable materials. However, field observations and experimental research extensively demonstrated that plasticity silty can also highly liquefiable...

Soybean cyst nematode (Heterodera glycines Ichinohe) (SCN) a major pest of soybean [Glycine max (L.) Merr.] in the southeastern USA. The objective of this study was to determine the effect of wet and dry silt loam and clay soils on SCN development and corresponding soybean yield response in a greenhouse study. ’Tracy-M’ soybean was grown in pots that contained either Dubbs ilt loam (fine-silty,...

abstract rice can be cultivated in various soils but soil with heavy texture and low permeability is more appropriate for its growth than other types of soil texture. it’s assumed that existence of zeolite in soil can be effective for moisture retention and avoiding of occurrence of crack in soil. in order to investigation of the effect of zeolite on moisture status and hydraulic properties of ...

Soil freeze-thaw cycles have a profound impact on heat and water fluxes at the land-atmosphere interface transport in soils. Microwave remote sensing is widely used technique to detect near-surface soil freeze/thaw states due significant changes dielectric properties associated with phase transitions soils, where uncertainty remains. This letter proposes new parameterization scheme for estimati...

Shell foundations are often used to raise the carrying capacity of a structure on weak soils. In cases where large superstructure loads must be transferred poorer soils, shell more cost-effective than ordinary shallow foundations. Advances in study and design shell-type have shown their superiority over traditional footings The current aims investigate shape’s influence ultimate load capacity. ...

For the construction of an irrigation district, geotechnical conditions existing soils in municipality Ponedera (Atlántico, Colombia) were analyzed, by means manual sampling and standard permeability test (SPT). This information was processed a database for analysis. The soil types obtained, most which classified as inorganic clays silts (CL ML), to lesser extent, silty clayey sands (SM SC), ma...

Because land application of broiler litter is commonly made in the spring before cropping season and in the fall, it is essential to understand how environmental variations, such as temperature, affect the phosphorus (P) dynamics. A laboratory incubation study was conducted at Waste Management and Forage Research Unit, USDAARS with the objective of determining the effects of temperature and soi...