Open AccessRESEARCH ON SHORTENING TIME WITHOUT AFFECTING THE ACCURACY OF DYER'S MODIFIED METHOD FOR THE DETERMINATION IN SOILS, OF PHOSPHORIC ACID, LIME AND POTASH SOLUBLE IN CITRIC ACID SOLUTION (1 PER CENT)
Author(s) -
J. A. Bonnet,
Fernando A. Villamil
Publication year - 2022
Publication title -
the journal of agriculture of the university of puerto rico/the journal of agriculture of the university of puerto rico
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.123
H-Index - 10
eISSN - 2308-1759
pISSN - 0041-994X
DOI - 10.46429/jaupr.v17i4.14258
Subject(s) - phosphoric acid , lime , citric acid , potash , chemistry , manganese , oxalate , precipitation , nuclear chemistry , inorganic chemistry , potassium , metallurgy , materials science , biochemistry , organic chemistry , physics , meteorology
Research was undertaken with the purpose of shortening time without affecting accuracy of the Dyer modified method for the determination in soils, of phosphoric acid, lime and potash soluble in 1 per cent citric acid solution. A short method is recommended for the lime determination based on the Chapman's method (4) for the precipitation of calcium oxalate in acid solutions (pH 3.9-4.2) in the presence of iron, aluminum, titanium, manganese, magnesium and phosphates. A short method is recommended for the phosphoric acid determination. Results are analyzed statistically by Student's method. Several of the colorimetric methods recommended for the phosphoric acid determination are also discussed.