The diversity of diazotrophic bacteria in the rhizosphere of Melastoma malabathricum L. was investigated by cloning-sequencing of the nifH gene directly amplified from DNA extracted from soil. Samples were obtained from the rhizosphere and bulk soil of M. malabathricum growing in three different soil types (acid sulfate, peat and sandy clay soils) located very close to each other in south Kalim...

Carbon-rich biochar derived from the pyrolysis of biomass can sequester atmospheric CO, mitigate climate change, and potentially increase crop productivity. However, research is needed to confirm the suitability and sustainability of biochar application to different soils. To an irrigated calcareous soil, we applied stockpiled dairy manure (42 Mg ha dry wt) and hardwood-derived biochar (22.4 Mg...

Root activity can modify the chemistry of the rhizosphere and alter phosphorus (P) availability and uptake. However, until recently, relatively little was known about the dynamics of soil solution P at the root surface because of our inability to measure in situ changes in solution P at the plant root. A mini-rhizotron experiment with corn (Zea mays L. cv. Stine 2250), soybean [Glycine max (L.)...

To asses the micronutrient status of soils under legume crop in arid region of Western Rajasthan a study was conducted. A total of 652 soil samples (445 samples of rhizosphere and 207 samples of non-rhizosphere) from farmer’s field were collected and analyzed for DTPA-extractable micronutrient status and soil properties. Content of micronutrient was in order of Mn> Fe> Cu> Zn. The DTPAMn, Fe, C...

In this study, we investigated the importance of plant cover for secondary succession and soil fungal community development in remediated substrates after EDTA washing metal-contaminated soils. The abundance total community, determined by ITS marker genes (Internal Transcribed Spacer region), root colonisation arbuscular mycorrhizal (AM) fungi were monitored two types material ( calcareous acid...

ing in the rhizosphere for decades, in the form of plant growth-promoting microorganisms. Efforts to incorporate microbial management into mainstream practices have not been successful. In fact, the same practices that increased yields in the last 50 years (namely fertilizers, herbicides, and pesticides) have largely eradicated natural rhizosphere microbes in agrosystems (Matson et al. 1997) an...

The complex and enormous diversity of microorganisms associated with plant roots is important for plant health and growth and is shaped by numerous factors. This study aimed to unravel the effects of the soil type on bacterial communities in the rhizosphere of field-grown lettuce. We used an experimental plot system with three different soil types that were stored at the same site for 10 years ...

abstract uranium as a natural radioactive heavy metal widely disperses throughout the earth's crust. in many cases, the natural abundance has been re-distributed due to anthropogenic activities, resulting in radionuclide contamination in groundwater and surface soil. uranium through the plant uptake can enter the chain. the degree of speciation of radio nuclides in soils in areas with differing...

this study was carried out to obtain quantitative relationships between zn in equilibrium solution and that retained by 20 calcareous soils. soils were brought into equilibrium with varying solution concentrations of zn, and the amounts removed from solution were used to check the fit to six adsorption isotherms, namely, freundlich, langmuir, temkin, gunary, two surface langmuir and adjusted fr...