+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Rapid extraction of available phosphorus in fertilizers

, : Rapid extraction of available phosphorus in fertilizers. Journal of the Association of Official Analytical Chemists 74(5): 809-811

A method for the rapid extraction of available phosphorus in fertilizer involves a single-step extraction that uses ethylenediaminetetraacetic acid (EDTA) as a complexing agent for Ca and Mg. This complexation of Ca and Mg enables the analyse to avoid the preliminary water extraction currently required. Sample extraction is similar to that in method 963.03B(b), Official Methods of Analysis, 15th Ed. The extractant consists of a solution of dibasic ammonium citrate, disodium EDTA, and ammonium hydroxide. The extract or residue may be analyzed by existing AOAC methods. Results by the new extraction method agree favorably with those by existing methods. Analyses of samples from the Magruder and the Association of Florida of samples from the Magruder and the Association of Florida Phosphate Chemists check sample programme agreed favorably with reported values for neutral ammonium citrate extraction.


Other references

Pflugfelder, O., 1952: Cnemidocoptes infestation in fowls. described changes in the thickness of the epidermis of the legs and histopathological lesions of epidermal and mesodermal tissues in fowls infested with C. mutans.

Mccune, D.C.; Weinstein, L.H.; Maclean, D.C.; Jacobson, J.S., 1967: The concept of hidden injury in plants. The term hidden injury has generally been applied to those pollutant effects that were not immediately obvious to the naked eye. Hidden injury is examined in the light of its historical development, our current knowledge of the effects of air poll...

Zajaczkowska, J.; Maszczyk, Z.; Piekarniak, K.; Manowska, W., 1960: alpha-Ethylthioisonicotinamide (Th-1314) in the treatment of pulmonary tuberculosis. Observation on 30 cases. (Preliminary communication). Gruzlica 28: 765-774

Garrison, R.H., 1971: What's "different" about two-year college teaching?. Nln Publications: 66-69

Stoyanow Alexander Alexander, 1930: Observations on Mississippian corals of Arizona. Pan-American Geologist 53(4): 317

Khan, S.; Vihinen, M., 2010: Performance of protein stability predictors. Stability is a fundamental property affecting function, activity, and regulation of biomolecules. Stability changes are often found for mutated proteins involved in diseases. Stability predictors computationally predict protein-stability changes c...

Barth, H.D.; Launey, M.E.; Macdowell, A.A.; Ager, J.W.; Ritchie, R.O., 2010: On the effect of X-ray irradiation on the deformation and fracture behavior of human cortical bone. In situ mechanical testing coupled with imaging using high-energy synchrotron X-ray diffraction or tomography is gaining in popularity as a technique to investigate micrometer and even sub-micrometer deformation and fracture mechanisms in minerali...

Fink, M.P., 1993: Adoptive immunotherapy of gram-negative sepsis: use of monoclonal antibodies to lipopolysaccharide. To provide a succinct overview of the scientific rationale for adoptive immunotherapy of Gram-negative sepsis using antibodies directed at epitopes in the core region of the lipopolysaccharide molecule. Relevant, English-language primary and secon...

Hall, L.; George, M.; Adams, T.; Sands, P.; Mccreary, D., 1991: The effect of season and stock density on blue oak establishment. General technical report PSW US Department of Agriculture Forest Service Pacific Southwest Forest and Range Experiment Station: 26) 312-319

Reissig, 1927: Combating pine caterpillars by airplane in 1926. Forstwiss Centralbl 49(3): 81-89