The three Thai PRs contain considerable amounts of some minor elements, e.g., Cd, Cr, Pb, and As depending on the type of phosphate mineral (Viisimaa et al. 1991; Figure 4 Backscattered electron ...

UTILIZATION OF ROCK PHOSPHATE IN ALKALINE SOILS BY PLANTS INOCULATED WITH MYCORRHIZAL FUNGI AND PHOSPHATE- SOLUBILIZING BACTERIA R. AXON. J. M. BAREA and D. S. HAYMAN* Microbiology Department, Zaidin Experimental Station. Granada, Spain Summary-Interactions between vesicular-arbuscular (VA) mycorrhizal fungi and phosphate-soiubihz- ...

Phosphate Rock Utilization Factors • Concentrated (beneficiated) PRs are usually about 27% to 37% P 2O 5 (may be as low as ~23%) • Low free carbonate content to avoid excess consumption of acid in phosphoric acid production • Low Fe 2O 3, Al 2O 3, and MgO contents (below ~5%) to avoid formation of intermediate products • Low Cl-content ...

Phosphate rock utilization . United States Patent 4834787 . Abstract: A process providing solubilization of phosphate rock by contacting the rock with sulfurous acid in the presence of an oxidizing agent selected from the group consisting of hydrogen peroxide and ozone. Use of sulfurous acid in combination with a substoichiometric amount of ...

Utilization of Phosphate Rock from Lisina for Direct Application: Release of Plant Nutrients in the Exchange-Fertilizer Mixtures. Journal of Agricultural and Food Chemistry, 2014. Lato Pezo. Download PDF. Download Full PDF Package. This paper. A short summary of this paper.

deficient tropical acid soils have important phosphate rock deposits, that is the raw material for the production of P fertilizers. Thus, under certain soil and climatic conditions, direct ... Exploring plant factors for increasing phosphorus utilization from rock phosphates ... Phosphate fixation capacity of Thai acid soils using 32P isotope ...

Attananda T and Vacharotayan S 1983 Rock phosphate utilization in acid sulphate soils of Thailand. In Proc. International Conference on Ecology and Managements in Asia. pp 280–292. FFTC Book Series No. 27. Google Scholar

Phosphorus release profiles and kinetics parameters for the fertilizers are shown in Fig. 2. Most minerals contained in TSP are water soluble and only a small part (~6% of the total P) are low ...

Description of the sample preparation was reported in Khare et al. 30 and Liu and Hesterberg. 31 Apatite (Ratchaburi phosphate rock) was provided by Dr. Chanida Charanworapan (Land Development ...

Phosphate rock utilization by soybean genotypes on a low-P savanna soil and the status of soil P fractions after a subsequent maize crop O. C. Nwoke 1*, J. A. Okogun 2§, N. Sanginga 3, J. Diels 4, R. C. Abaidoo 5 and O. Osonubi 6 1Department of Agronomy, College of …

Phosphate rock used for fertilizer is a major NORM due to both uranium and thorium. Phosphate is a common chemical constituent of fertilizer. It is principally mined from apatite and phosphate rocks (phosphorite) in which the concentration of phosphate has been enhanced by sedimentary, igneous, weathering, and biological processes.

PHOSPHATE ROCK MATERIALS IN A SOYBEAN — MAIZE CROP ROTATION USING 32P ISOTOPE TECHNIQUES ... Thus, the utilization of mixtures of PR and water-soluble P such as TSP can improve the efficacy of PR compared to the ... Thai and foreign sources of phosphate rock in a crop rotation soybean-maize grown in Pakchong soil.

Utilization of rock phosphate Babare, A.M., R.J. Gilkes, and P.W.G. Sale. 1997. The effect of phosphate buffering capacity and other soil properties on North Carolina phosphate rock dissolution, availability of dissolved phosphorus and relative agronomic effectiveness. Australian J.

In the phosphate industry, the phosphate content of the rock is usually expressed as tricalcium phosphate and traditionally referred to as bone phosphate of lime (P 2 O 5 × 2.1853 = BPL). The latter term is reminiscent of the time when bones were the principal source of phosphate …

TCP and Rock phosphate solubilization by mangrove fungi grown under different pH and temperature in liquid culture. Journal of Agricultural Technology 6(3): 421-428. The objective of this work was to evaluate theefficiency of mangrove phyllosp here fungi in solubilization of tricalcium phosphate and rock phosphate in liquid culture. Total 14 fungi