HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Shoemaker, H. E. Articles by Pratt, P. F. Search for Related Content PubMed Articles by Shoemaker, H. E. Articles by Pratt, P. F. Agricola Articles by Shoemaker, H. E. Articles by Pratt, P. F.

Buffer Methods for Determining Lime Requirement of Soils With Appreciable Amounts of Extractable Aluminum¹

ABSTRACT

Studies were conducted to determine why certain soil test methods fail to indicate the actual lime requirement in many Ohio soils. Samples of 14 soils from various areas of the State were collected for study. The soils were incubated with various rates of applied CaCO₃ to determine actual lime requirement of each soil. Attempts were made to find laboratory methods that would accurately indicate the lime requirement of each. For these soils the Woodruff method had indicated only about half the amount of the actual lime requirement. The Mehlich triethanolamine method indicated accurately the amount of lime required for the unlimed acid soils. However, this method indicated too high a lime requirement on soils partially limed. Subtraction of the acidity measured above pH 6.8 by the triethanolamine method and then addition of the extractable Al, gave a very good indication of lime needs on all soils not limed above neutrality regardless of lime additions. Addition of extractable Al to total bases and triethanolamine-measured acidity to pH 6.8 gave nearly constant cation-exchange capacities of soils regardless of lime additions. These studies have led to development of an improved soil test buffer method for rapid routine laboratory analyses. It appears to be adequate for indicating lime needs of soils regardless of extractable (soluble) Al present.

¹ Published with the permission of the Director of the Ohio Agr. Exp. Sta. as Journal Article No. 65–60. Presented before Div. II, Soil Science Society of America, Lafayette, Ind. Aug. 6, 1958. The results were used in part by the senior author in partial fulfillment of the requirements for the Ph.D. degree in 1959 from the Ohio State University.

² Extension Agronomist and Professor, Ohio State University, and former Assistant Professor, Ohio State University, now Associate Chemist, California Agr. Exp. Sta., Riverside, respectively.

Received for publication August 18, 1960. Accepted for publication November 23, 1960.