An automated method for the simultaneous measurement of water content, soil water pressure, and soil bulk electrical conductivity in soil columns was developed based on time domain reflectometry (TDR), three wire probes and pressure transducers. Soil electrical conductivity was …
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The use of biosolids as a soil fertilizer has been shown to be an agronomically beneficial practice. Biosolids supply nutrients and organic matter to semi-arid soils. However, biosolids contain heavy metals. Long-term use may result in the accumulation of heavy metals in soils. …
Experiments have been conducted on measuring the combined effects of (1) time after sludge application, (2) temperature of equilibration, and (3) soil properties (principally pH and texture) on P availability and chemical fractions. Plant-available P (measured by iron-oxide stri…
Nitrate contamination of surface and groundwater has become a serious concern in many agricultural areas throughout the world. The major source of nitrate contamination is believed to be nitrogen fertilizer from agricultural fields. Best Management Practices have been developed …
Because many natural wetlands function as ground water filters in the landscape, wetlands are now protected. Wetlands must have hydric soils, hydrophytic vegetation, and high water tables. We characterized the hydrology and morphology of a soil toposequence that developed on dun…
The existence of root exudates has been known for a long time. Their role and function in plant nutrition and soil chemistry have only recently begun to be understood. Studies have demonstrated that the primary constituents of the root exudates are low molecular weight organic a…
The work reported here describes the water distribution patterns in sandy loam and silt loam soils under surface and micro-irrigation at different temperatures simulating the arid region conditions such as those experienced in the Balochistan Province of Pakistan. Specific consi…
Many chemical and physical factors govern the mobility of metal contaminants in soils and clay systems; some of these chemical factors include mineralogical composition, cation exchange capacity, organic matter content, pH and the ionic strength of soil water. This makes underst…
Investigation has been made into the properties of Red Soilsin West Java, Indonesia, selected from two different parent materials.Profiles P. Tb and P. Rb are derived from dacitic tuff and P. Js frompumice volcanic ash, both of which are acid in character. ProfilesL. Km, L. Dr a…
The direct application of rock phosphate (RP) can be a good alternative to water-soluble P fertilizers. However, despite the extensive work done on RPs, there are no models to predict amounts of RP required. A study including both laboratory and field experiments was conducted t…
Stone columns are known to be a cost effective and environmental friendly ground improvement technique, which is widely used to enhance the performance of shallow foundations built on soft ground. Stone columns increase bearing capacity, reduce settlement, reduce significantly t…
Hydrophobic regions in sandy soils have been reported for citrus groves, rangelands, and golf course putting greens. Previous studies have implicated either lipids or organic acids as the causal agent for soil hydrophobicity. The present study was conducted to provide a more com…
This study was made of classifying the soils and determining the heavy metal pollution of the soils and water resources in the Bursa province. Twelve profiles of five different soil type were examined and classified according to the systems of Fitzpatrick (1988), FAO/UNESCO (197…
Though the majority of the Antarctic continent is covered by ice, portions of Antarctica, mainly in the McMurdo Dry Valleys and the Transantarctic Mountains (TAM), are currently ice-free. The soils which have developed on these surfaces have been re-worked by the advance and ret…