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Availability of Cu, Zn and Mn in soils: II. —Chemical extractability
Author(s) -
Dolar S. G.,
Keeney D. R.
Publication year - 1971
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740220603
Subject(s) - chemistry , soil water , manganese , zinc , organic matter , environmental chemistry , copper , chemical composition , soil science , geology , organic chemistry
The interrelationships of the amounts of Cu, Zn and Mn extracted with four chemical extractants of varying pH and buffering capacities, and as influenced by soil pH, organic matter, and available P, were evaluated. Regression equations using 0·1 N ‐HCl, 0·01 M EDTA, and 0·005 M DTPA soil‐extractable fractions in conjunction with the soil properties for the estimations of total Cu, Zn and Mn in divergent Wisconsin soils are also given. The relationship of the Mg(NO 3 ) 2 ‐extractable fractions of the three elements to the above four fractions were better defined by quadratic than by linear equations. Exchangeable Zn had positive while exchangeable Mn had negative influence on exchangeable Cu in these soils with widely varying Cu supply. Both exchangeable Cu and Mn increased Mg(NO 3 ) 2 ‐extractable Zn, whereas exchangeable Cu depressed the Mg(NO 3 ) 2 ‐extractable soil Mn.