Prediction of anion adsorption behavior is enhanced by understanding the adsorption mechanism. This study was conducted to evaluate ionic strength effects on B adsorption and to infer B adsorption mechanisms on various surfaces. Boron adsorption on the Fe oxide goethite, the Al oxide gibbsite, the clay minerals kaolinite and montmorillonite, and two arid-zone soils was investigated as a functio...

The Ord River Irrigation Area is 3200 km NE of Perth on latitude 15 30’ S, at an altitude of less than 100 m, with rainfall of 800 mm. Water is supplied from the vast Lake Argyle, soils utilised for agriculture are predominantly black montmorillonitic clays and topography is generally very flat. Growing conditions are superb for most tropical crops. Out of a total of 11000 ha under irrigation, ...

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,...

The goal of this paper is to use an Egyptian modified clay found in Suez zone, montmorillonitic remove hazardous lead and nickel from water-based contaminated media. FT-IR instrument was utilized detect the functional groups on clay's surface. specific surface area absorbent determined be around 433 m2/g. Iron particles are intercalated between sheets clay, according XRD patterns. Pb+2, Ni+2 ha...

Soils often show supersaturation with respect to calcite. This study was undertaken to test alternative methods of measuring Ca2+ and COjactivities to assess their effects on measured ion-activity products (IAP) of calcite in soils. Soils were reacted with atmospheric CO,(g) and distilled H 2 0 for 1,3, and 7 d. The soil extracts were analyzed for pH, electrical conductivity (EC), cations, anio...

all of the tea plantations in iran are concentrated in the caspian sea region on soils previously developed under deciduous natural forests. this research conducted to study the effect of land use change (from forest to tea) on selected physico-chemical and mineralogical properties of soils under humid climate and mountainous landscape in northern iran. three transects facing west to northwest ...

The adverse effects of exchangeable sodium on soil hydraulic conductivity (K) are well known, but at present only sodicity and total electrolyte concentration are used in evaluating irrigation water suitability. In arid areas, high sodicity is often associated with high dissolved carbonate and thus high pH, but in humid areas high sodicity may be associated with low pH. To evaluate the effect o...

1. Soil Formation is a Global Natural Process 2. Factors of Soil Formation 3. Stages of Soil Formation 4. Processes of Soil Formation 5. Genesis of Soils under Different Ecologic Conditions 5.1. Genesis of Soils under Conditions of Cryogenesis 5.2. Genesis of Soils of Forest Landscapes in a Zone of Moderate Climate 5.3. Genesis of Soils in Landscapes of Steppes and Prairies 5.4. Genesis of Soil...