The phenomenon that wild grasses did not grow beneath the tree of Quercus mongolica Fisch var. grosseserrata Rehd. Wils. while they grew vigorously beneath other species of trees around Q. mongolica was observed in many places in the Hokkaido district. The allelochemicals in the soil beneath Q. mongolica were studied. This soil inhibited the growth of lettuce (Lactuca scariola L. var. sativa Bi...

Pseudomonas chlororaphis strain JP1015 and P. fluorescens strain JP2175 were previously isolated from Mississippi cornfield soil samples and selected for their growth inhibition of Aspergillus flavus in laboratory culture. In this study, the antifungal activity of these bacterial strains against A. flavus in soil coculture was determined. Growth of A. flavus was inhibited up to 100-fold by P. c...

Soil and vegetation are two critical factors for controlling the overland transport kinetics of pathogens in a natural environment. With livestock operations moving more towards concentrated animal operations, the need to dispose of a very large amount of manure in a localized area is becoming increasingly important. Animal manure contains a substantial amount of microbial pathogens, including ...

An enrichment culture capable of naphthalene mineralization reduced Fe(III) oxides without direct contact in anaerobic soil microcosms when the Fe(III) was placed in dialysis membranes or entrapped within alginate beads. Both techniques demonstrated that a component in soil, possibly humic materials, facilitated Fe(III) reduction when direct contact between cells and Fe(III) was not possible. T...

Increasing availability of soil arsenic is of significance for accelerating phytoremediation efficiency of As-polluted sites. The effects of seven amendments, i.e., citrate, oxalate, EDTA, sodium polyacrylate (SPA), phosphate rock (PR), single superphosphate (SSP), and compost on fractionation and phytoavailability of soil As were investigated in lab culture experiment. The results showed that ...

The aim of this investigation was to study whether certain bacteria could be used for cyanide degradation in soil. The bacteria Pseudomonas stutzeri and Bacillus subtilis were selected based on their good growth in a minimal medium containing 0.8 mg mL-1 potassium cyanide (KCN). In this study we tested their ability to reduce cyanide levels in a medium containing 1.5 mg mL-1 of KCN. Although bo...

This work presents a three dimensional model simulating water transfers in soil and root systems (figures will be 2D for a better readability). Simulations are usually performed using a layer discretisation of soil space ([12]) often monodimensional or a global fluxes budget ([15]). Some experimental models simulate individual roots ([2]) but are huge consumers of computer ressources. Our appro...

Among all the aromatic compounds phenol is the major constituent of soil contaminated form many industries. Toxicity of phenol is well recognized for human as well as environment. In future, microbial system is the potential tool to deal with environmental pollutants like phenol. In the present study, an aerobic bacterial culture was isolated from oil contaminated soil by enrichment technique a...

During the process of screening for a potent antimicrobial compound, a new strain was isolated from the soil sample of Thalaikunda village in Ooty, Tamil Nadu. That organism was name as NK(2). It was found to be antagonistic to both bacterial and fungal test organisms. Production of antibiotic was more in a newly formulated broth. Antibiotic production reached maximum at the end of the 70 h of ...