the potential risk of metal accumulation in periurban agricultural areas is a matter for concern.the climate characteristics and carbonate content of calcareous agricultural mediterranean soils typical inthese areas favour metal accumulation at the surface level; however there is also a risk of potential metalmobility. our study focuses on the soil properties affecting metal mobility in these s...

A field experiment was carried out to investigate the effects of vermicompost (0, 10, and 15 tha-1), climatic elements i.e. soil moisture (50%, 70%, 100%) elevation temperature (1 20C) on physico-chemical properties nutrient availability post-harvest calcareous-acid mixed soils after rice production. total 18 treatments assembling afore-mentioned doses applied. The analyses demonstrated signifi...

In calcareous soils, phosphorus (P) retention and immobilization take place due to precipitation and adsorption. Since soil pH is considered a major soil variable affecting the P sorption, an acidic P fertilizer could result in low P adsorption compared to alkaline one. Therefore, P adsorption from DAP and phosphoric acid (PA) required to produce desired soil solution P concentration was estima...

Gray hydromorphic soils are imperfectly to poorly drained soils that occur on the coastal fringes of the Hawaiian Islands on surfaces of Pleistocene to Recent age. Mottling is characteristic of the soils, and gley horizons occur in the more hydromorphic soils in the group . As the soils become hydromorphic, soil color values increase and structures deteriorate. Halloysite is the dominant clay m...

Considerable information on copper (Cu) ecotoxicity as affected by biological species and abiotic properties of soils has been collected from the last decade in the present study. The information on bioavailability/ecotoxicity, species sensitivity and differences in laboratory and field ecotoxicity of Cu in different soils was collated and integrated to derive soil ecological criteria for Cu in...

Golden Camellia species are highly specific to certain soil environments. Most only native calcareous soils in karst regions, except for a few that grow acidic soils. Our aim is elucidate the adaptation mechanisms of calcareous-soil golden (CSC) and acidic-soil (ASC) habitat through plant–soil nutrient characteristics their relationships. We investigated 30 indices plants. Compared with ASC, CS...

introduction: iron cycle is one of the most important biogeochemical processes which affect the availability of iron in soils. ferric iron oxides are the most abundant forms of iron in soils and sediments. ferric iron is highly insoluble at circumneutral ph. present investigations have shown that the structural ferric iron bound in clay minerals is reduced by some microorganisms. anaerobic bact...

Bennett et al. [1] present the phylogenetic distribution of salt-tolerant species on a phylogeny of 2684 grasses in the context of plant breeding for salt-tolerance. Salt-tolerance, they conclude, is an evolutionary labile trait that has evolved a number of times across many lineages; this is at odds with the record of difficulty in breeding salt-tolerant crops. One potential explanation for th...

Calcareous soils are known for their alkaline pH-promoting insoluble forms of certain nutrients, including phosphorus (P). Rhizosphere acidification is one the main physiological mechanisms mobilization by plants. However, specific and genotypic differences in response to P deficiency often observed, giving some genotypes particular tolerance abilities. This genetic potential gives us a new opp...

Although iron (Fe) is the fourth most abundant element in the Earth’s crust and upper mantle (lithosphere), Fe deficiency is among the most common plant micronutrient deficiencies. There are multiple contributing factors, but the most important for practical purposes in California orchard crops are those soil and water characteristics that cause lime-induced Fe chlorosis: soil and water with hi...