EVALUATION OF CALCIUM DIHYDROGEN PHOSPHATE SOLUTION AS AN EXTRACTANT FOR INORGANIC SULFATE APPLIED TO SOILS

Authors
WADA SI KAKUTO Y ITOI R KAI T
Citation
Si. Wada et al., EVALUATION OF CALCIUM DIHYDROGEN PHOSPHATE SOLUTION AS AN EXTRACTANT FOR INORGANIC SULFATE APPLIED TO SOILS, Communications in soil science and plant analysis, 25(11-12), 1994, pp. 1947-1955
Citations number
14
Categorie Soggetti
Agriculture Soil Science","Plant Sciences","Chemistry Analytical
Journal title
Communications in soil science and plant analysis → ACNP
ISSN journal
00103624
Volume
25
Issue
11-12
Year of publication
1994
Pages
1947 - 1955
Database
ISI
SICI code
0010-3624(1994)25:11-12<1947:EOCDPS>2.0.ZU;2-D
Abstract
To evaluate conventional calcium dihydrogen phospahte [Ca(H2PO4)2] sol ution containing 500 mg P/L as an extractant for soluble plus adsorbed sulfate (SO4), we added known amounts of SO4 to 10 soil samples diffe red in clay mineral composition and extracted with Ca(H2PO4)2 solution . The experimental results showed that the five successive extractions at a soil:solution ratio of 1:10 could quantitativeIy recover the add ed SO4, and there was little effect of air-drying the soils after addi tion of SO4. Based upon these experimental results, we concluded that the Ca(H2PO4)2 extraction is an excellent method for determining solub le plus adsorbed inorganic SO4 in soils.