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The Chemical Estimation of Plant Available Soil Manganese
Author(s) -
Hoff D. J.,
Mederski H. J.
Publication year - 1958
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1958.03615995002200020010x
Subject(s) - manganese , hydroquinone , chemistry , extraction (chemistry) , phosphate , ammonium phosphate , soil test , environmental chemistry , soil water , soil science , chromatography , environmental science , biochemistry , organic chemistry , fertilizer
Nine methods of extracting manganese from 25 soils were studied and correlated with manganese absorbed by soybean plants. Two of the methods, extraction with 0.1 N H 3 PO 4 and 3 N NH 4 H 2 PO 4 for 1 hour at a 1:10 soil/solution ratio, were developed during the investigation. Of the nine methods investigated, extraction of soil manganese with NH 4 H 2 PO 4 , alcoholic hydroquinone, and H 3 PO 4 yielded the highest correlation coefficients (0.856 to 0.899), had the smallest variances, and as a group were statistically different from extraction with NH 4 OAc, NaOAc, and total soil manganese as methods of estimating plant available manganese. The ammonium dihydrogen phosphate extraction method with the highest correlation coefficient (0.899) was statistically different from methods of extracting soil manganese with H 2 SO 4 , hydroquinone in NH 4 OAc, HNO 3 , NH 4 OAc, NaOAc, and total soil manganese. Results indicate that manganese deficiency in soybeans may be expected if the manganese extracted with ammonium dihydrogen phosphate or phosphoric acid is less than 40 pp2m. With alcoholic hydroquinone, manganese deficiency may be expected if the manganese extracted is less than 125 pp2m.