EurekaMag.com logo
+ Site Statistics
References:
53,214,146
Abstracts:
29,074,682
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Basic EDTA as an extractant for soil organic phosphorus






Soil Science Society Of America Journal. 57(6): 1516-1518

Basic EDTA as an extractant for soil organic phosphorus

Soil organic P is an important source of plant-available P in the Great Plains. It is, therefore, important in conservation tillage agriculture, that we know the size and the potential availability for crop use of this large P pool, which could exceed one-half of the total P. We propose a one-step procedure with hot basic EDTA (ethylene diaminetetraacetic acid) for total soil organic P that requires minimum manipulation and analytical prowess. Soil samples (0.5 g) were incubated for 2 h at 85 degrees C with 25 mL of 0.25 M NaOH + 0.05 M Na2EDTA, after which time the organic P in the extracts was determined by persulfate oxidation. Results from the evaluation of nine soils from various parts of the USA and one Canadian soil showed significant correlations with an existing wet sequential extraction and a dry high-temperature ignition method for total organic P determinations. With the high-organic-matter Canadian soil, the EDTA method extracted 32% more organic P than the wet extraction method, and essentially the same as the dry ignition method. The new method appears to be especially useful for soils where organic acids and chelation mechanisms with P may be more dominant than ester-type formations.

Accession: 002308377

DOI: 10.2136/sssaj1993.03615995005700060020x

Download PDF Full Text: Basic EDTA as an extractant for soil organic phosphorus



Related references

Soil organic phosphorus : I. Methods for the extraction and partial fractionation of soil organic phosphorus. II. The nature of soil organic phosphorus. III. Patterns of organic phosphorus in a series of representative New Zealand soils. N.Z. J. agric. Res, 1: 723-735; 736-749; 750-760, 1964

Effect of edta and dtpa on available phosphorus extraction with the kelowna multiple element extractant. Canadian Journal of Soil Science 69(2): 191-198, 1989

Use of sodium EDTA in the determination of soil organic phosphorus. Jour Soil Sci 14(1): 82-87, 1963

An assessment of EDTA as an extractant of organic-complexed and amorphous forms of Fe and Al in soils. Geoderma 35(2): 109-118, 1985

The use of sodium EDTA as an extractant for determining available phosphate in soil. Gederma 14(3): 261-265, 1975

An assessment of edta as an extractant of organic complexed and amorphous forms of iron and aluminum in soils. Geoderma 35(2): 109-118, 1985

Soil phosphorus studies: II. The concentration of organic and inorganic phosphorus in the soil solution and soil extracts and the availibility of the organic phosphorus to plants. Soil Science 24(2): 119-128, 1927

Effect of concentration, pH and time on the properties of di-ammonium EDTA as a multiple soil extractant. Agrochemophysica. 3: 4, 49-54, 1971

The aim of determination of assimilable phosphorus in the soil. Introduction to the study of the influence of the pH of the extractant on the content of phosphorus extracted.. An. Primeira Reun. Brasil Ciene. Solo, 1950. 281-287, 1950

Acid ammonium acetate-EDTA universal extractant in soil testing and environmental monitoring. Communications in Soil Science & Plant Analysis 25(9-10): 1755-1761, 1994