rock phosphate residual

A field experiment was conducted to evaluate the residual effect of rock phosphate and waste mica enriched compost on phosphorus and potassium supplying capacity under soybean crop grown after wheat in a Typic Haplustept.

Get Price

The phosphate esters bearing OH groups are acidic and partially deprotonated in aqueous ... Anatoxina(S) is a naturally occurring organophosphate produced by cyanobacteria. Pesticides. The word "organophosphates", when appearing in communications ... especially through contaminated clothing in which the residue settles as house dust. ...

Get Price

The potential for percent of the world’s production of phosphate decomposition of buried crop residue is high rock (PR), yet it has the lowest phosphate con compared to that surface placed due to better sumption with percent of the world’s con access by microbial populations and …

Get Price

(See 'Rock phosphate sources', page 54.) Residual phosphorus trials In 1975 a large field research programme was started on nonleaching soils in the SouthWest. The aim was to measure the initial and residual Duchess rock phosphate 53 Journal of Agriculture, Vol 26, No. 2, 1985.

Get Price

A field experiment was conducted to evaluate the residual effect of rock phosphate and waste mica enriched compost on phosphorus and potassium supplying capacity under soybean crop grown after wheat in a Typic Haplustept.

Get Price

Phosphate rock in Wyoming was first mined in 1907, and production in the western portion of the state was sporadic until the opening of the Leefe Mine in 1947 (Jasinski and

Get Price

Soft rock phosphate or colloidal phosphate is the choice of sustainable agriculture. Mineral Development Fertilizer provides low cadmium organic fertilizer, nutrient dense soft rock fertilizers and more. ... constant supply of residual phosphorus over a number of years verses the typical approach of a single application of the acid phosphates ...

Get Price

The residual value of three nitrophosphates, potassium metaphosphate, basic slag and rock phosphate was compared with that of superphosphate in two experiments with potatoes, barley and swedes grown in …

Get Price

quantitative determination of residual phosphate and phosphite in bisphosphonates by ion exchange chromatography using conductivity detection girish r deshpandea, ... residual phosphate …

Get Price

Comparative effects of Minjingu phosphate rock and triple super phosphate on residual P in an Ultisol Kalala, 1 Semoka, 1Soil Science Department, P. O. Box 3008, Sokoine University of Agriculture, Tanzania Corresponding author: asherikalala

Get Price

Rock phosphate was arithmetically higher than the cumulative soluble P in 1999. In 2000 and 2001, cumulative P fertilizer (TSP) gave higher available P soil content than residual rock phosphate (Table 5). 4 Conclusion The residual effect of P rock phosphate was highly beneficial to grain yield and soil available P content.

Get Price

Rock phosphate superphosphate relative effectiveness residual value dissolution of rock phosphate soil test for phosphate field experiment glasshouse pot experiments laboratory studies This is a preview of subscription content, log in to check access.

Get Price

Rock phosphate is mined from large deposits at Lao Cai in the North and has been tried there as fertilizer for paddy pro duction on various soils since 1960, with positive results on acid soils low in phosphorous, especially on acid sulphate soils. On these latter soils low grade Lao Cai phosphate gives a strong residual effect which

Get Price

Bolland MDA (1985) Residual value for wheat of phosphorus from Calciphos, Duchess rock phosphate and triple superphosphate on a lateritic soil in southwestern Australia. Aust J …

Get Price

Direct and residual effect of rock phosphates on rice (Oryza sativa L.) productivity and soil phosphorus status in Alfisols of Eastern Plateau of India

Get Price

Phosphate rock is a general term referring to rock with high concentrations of phosphate minerals, most commonly those of the apatite family with the general formula Ca 5 (PO 4 CO 3) 3 (F,OH,Cl). Ninety percent of phosphate mined is used to produce chemical fertilisers.

Get Price

Larger residual effects were secured from acid phosphate on soil containing lime naturally or by applications of limestone than on acid soils. The amount of phosphate left in the soil from the applications was determined by the rate of exhaustion.

Get Price

Residual effect of Rock phosphate, FYM and EM on nutrient (N,P K) uptake of Wheat. Data on the residual effect of rock phosphate application with FYM and EM showed significant variations on Nitrogen, Phosphorus and Potash uptake by wheat.

Get Price

Rock phosphate and superphosphate both had a good residual value, and the yields obtained with both fertilizers were not significantly different after the first few years. The total yield of pasture over the 7 year period was similar for both fertilizers. A low residual value of gypsum as a …

Get Price

Bowden, J W, and Bolland, M D. (1987),Residual value of rock phosphate fertilizers. Department of Agriculture and Food, Western Australia, Department of Agriculture and Food, Western Australia, Perth.

Get Price

RESIDUAL VALUE OF SUPERPHOSPHATE AND QUEENSLAND ROCK PHOSPHATE MEASURED USING YIELDS OF SERRADELLA, BURR MEDIC AND SUBTERRANEAN CLOVER GROWN IN ROTATION WITH WHEAT AND BICARBONATEEXTRACTABLE SOIL PHOSPHORUS M. D. A. Bolland Western Australian Department of Agriculture, Division of Plant Industries,

Get Price

The availability of residual phosphorus from longtime superphosphate applications to Groseclose silt loam exceeded that of rock phosphate. Based on A values, residual phosphorus from superphosphate was approximately four times as available as that from rock phosphate.

Get Price

Keeping in view the importance of P in crops production and improv ing its solubility from rock phosphate (RP) through composting, this study was planned to determine and com pare the effect of composts prepared from different organic materials with RP on yield and P uptake of berseem and their residual effect on maize crops.

Get Price

Phosphorus was applied at the rates of 0, 20,40 and 60 kg P ha1 as Minjingu Phosphate Rock (MPR), Minjingu mazao and Triple Super Phosphate (TSP). ... the major residual phosphate compound in calcareous soils is octa calcium phosphate, ...

Get Price

Direct and residual effect of rock phosphate on soil and crop production Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website.

Get Price

The Initial and Residual Value of Phosphorus from Apatite Rock Phosphates and Superphosphates as Measured by 32p Dilution Technique ZAHARAH and SHARIF DIN Department Jor Soil Science, Faculty ojAgriculture, Universiti Pertanian Malaysia, 43400 UPM Serdang, Selangor Darul Ehsan, Malaysia. ABSTRAK

Get Price

Phosphorite, phosphate rock or rock phosphate is a nondetrital sedimentary rock which contains high amounts of phosphate minerals. The phosphate content of phosphorite (or grade of phosphate rock) varies greatly, from 4% to 20% phosphorus pentoxide (P 2 O 5).

Get Price

comparative effects of minjingu phosphate rock and triple super phosphate on residual p in an ultisol by asheri mwamba kalala a dissertation submitted in partial fulfilment of the requirements for the degree of master of science in soil science and land management of sokoine university of agriculture. morogoro, tanzania. 2011

Get Price

organic materials with rock phosphate (RP) on yield and P uptake of berseem and their residual effect on maize crop (cv. Azam) during 20112012. Composts prepared from RP fed farm yard manure (FYM), simple FYM, organic waste and city garbage were applied at the rate based on their P concentrations.

Get Price

Residual value of superphosphate and rock phosphate on an acid soil II. Soil analysis and greenhouse experiments Volume 60 Issue 3 G. E. G. Mattingly ... field experiment to estimate residual values of phosphates were used to show changes in the amount and distribution of residual phosphate in the soil. 2.

Get Price

Phosphate rock that is to be used for the production of granular triple super ... air flow rates, product moisture, and grade of rock. Phosphate rock contains radionuclides in concentrations that are 10 to 100 times the ... Oilfired dryers and calciners have a potential to emit sulfur oxides when highsulfur residual fuel oils are burned ...

Get Price

RESIDUAL EFFECT OF HAZARA ROCK PHOSPHATE ON WHEAT AND MAIZE IN ALKALINE SOILS 1757 Fig. 1. Grain and biomass yields of wheat and residual maize as influenced by different levels of HRP under alkaline calcareous soil.

Get Price

phosphorus and calcium, and mineralize rock phosphate (Clark, 2007; Bjorkman and Shail, 2010). When buckwheat residue is incorporated into the soil, it rapidly breaks down and releases nutrients for uptake by the subsequent crop (Oplinger et al., 1989).

Get Price

Add a Comment