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A Comparison of Several Methods of Determining Lime Requirements of Soils
Author(s) -
McLean E. O.,
Dumford S. W.,
Coronel F.
Publication year - 1966
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/sssaj1966.03615995003000010015x
Subject(s) - lime , soil water , incubation , chemistry , organic matter , buffer (optical fiber) , acre , salt (chemistry) , environmental chemistry , zoology , environmental science , soil science , agronomy , biology , materials science , metallurgy , biochemistry , telecommunications , organic chemistry , computer science
Buffer‐indicated lime requirements of four groups of soils using several buffer methods were related to CaCO 2 incubation‐measured lime requirements through regression analysis. Salt accumulated during the incubation period had marked effect on the amount of lime required to bring the soils to pH 6.5. Results from all buffer methods were highly correlated with incubation‐measured values. Slopes and intercepts of regression lines revealed the marked tendency for the Woodruff buffer to indicate too much at low lime requirement levels and too little at high levels. The Mehlich buffer at pH 8.1 indicated approximately the correct amount for soils of high lime requirement but too much for those at low levels. Peech alterations of the Mehlich and the regular Mehlich method gave the same results. The Shoemaker, McLean, and Pratt method was found to be relatively rapid, accurate, and especially well adapted for soils requiring >4,000 lb of lime per acre, having