An 'anomalous' negative flux, in which carbon dioxide (CO2) enters rather than is released from the ground, was studied in a saline/alkaline soil. Soil sterilization disclosed an inorganic process of CO2 dissolution into (during the night) and out of (during the day) the soil solution, driven by variation in soil temperature. Experimental and modeling analysis revealed that pH and soil moisture...

boron (b) is an important plant essential micronutrient whose availability is influenced by many soil factors. adsorption–desorption processes play a major role in governing the solubility of boron in soil solution and, consequently, its availability to growing plants. to assess the effect of sodium adsorption ratio (sar) on availability of b, adsorption of b was investigated in a sampled calca...

concentrations in saline soils are often caused by lack of drainage and are associated with elevated salinity. Prediction of B adsorption and transport has required detailed The narrow range between deficiency and toxicity studies of B adsorption and subsequent determination of model panecessitates accurate quantification of soil solution B rameters. In this study we tested a general regression...

[1] Results from the Mars Phoenix mission Wet Chemistry Laboratory (WCL) are used to determine the oxidation‐ reduction potential (Eh) of the Phoenix WCL Rosy Red sample soil solution. The measured Eh of the Rosy Red sample in the WCL aqueous test solution was 253 ± 6 mV at a pH of 7.7 ± 0.1. Measured solution Eh changes correspond to changes in solution H activity, which is controlled mainly b...

abstract irrigation planning and management requires continious monitoring and measurements of soil moisture content. application of gypsum blockes (gb) are common in soil moisture measurements. gb readings are subjected to its geometry and soil solution concentration. this study was carried on 90 gb in research greenhouse of faculty agricultural, ferdowsi university of mashhad. at the begining...

Recently discovered As-hyperaccumulator ferns hold promise for phytoremediation of As-polluted soils. We investigated changes in the rhizosphere characteristics of Pteris vittata (Chinese Brake fern) relevant for its use in phytoextraction. Plants were grown in rhizoboxes filled with soil containing 2270 mg kg(-1) As. Dissolved organic carbon (DOC) concentrations in rhizosphere soil solution we...

saturated hydraulic conductivity (ks) is one of the most important physical features of soil that have wide usage in soil and water science. measuring ks carries on laboratory and field. guelph permeameter (gp) method is one of the field measuring method for determining field saturated hydraulic conductivity (kfs) above the ground water table. well-shape-factor (c) is one important parameter ne...