Phosphorus (P) availability is commonly assumed to limit productivity in many tropical soils, yet there relatively little information on the phosphorus chemical forms, distribution, and transformations that P acid soil. The best way obtain of separate fractions soil using series solvents different strength sequential analysis. method used was Chang Jackson Formation forms their binding largely ...

The Reflejos de Mar Li-pegmatite, located in northwestern Argentina, is part of the Villismán pegmatite group, Ancasti District, Pampean Pegmatite Province. Four garnet crystals from outermost were analyzed by major and minor elements (SiO2, TiO2, Al2O3, Cr2O3, MgO, CaO, MnO, FeO) using electron microprobe. belongs to rare-element class, spodumene type, LCT (Li-Cs-Ta) petrogenetic family. Based...

Investigation of the interaction of MgADP- and MgATP2- with the Fe protein of Klebsiella pneumoniae nitrogenase by 31P NMR showed that the adenine nucleotides are reversibly bound in slow exchange with free nucleotides. Dissociation of the MgADP--Fe protein complex was slow enough to enable its isolation by gel filtration, thus permitting the assignment of resonances to bound nucleotides. Spect...

To elucidate the mechanism of mobilization of insoluble phosphates, a field trial and a split root experiment in a growth chamber were conducted. The results showed that a phosphorus (P)-efficient wheat genotype, Yanzhong 144 (YZ), transpired 50% less than a P-inefficient genotype, 80-55. At the grain-filling stage, the free water content in YZ’s rhizosphere was 2.4 times of that of 80-55’s. Wh...

The aqueous concentrations of heavy metals in soils, sediments, and aquatic environments frequently are controlled by the dissolution and precipitation of discrete mineral phases. Contaminant uptake by organisms as well as contaminant transport in natural systems typically occurs through the solution phase. Thus, the thermodynamic solubility of contaminant-containing minerals in these environme...

Phosphorus content in the soil, features of profile distribution, proportion organic and mineral compounds other indicators characterize level soil fertility. Therefore, studies phosphate status different subtypes agrocenoses are relevant. The aim research was to study change fractional composition phosphates podzolicchernozem compared fallow land after application fertilizer systems field crop...