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 Reeve, N. G. Articles by Sumner, M. E. Search for Related Content PubMed Articles by Reeve, N. G. Articles by Sumner, M. E. Agricola Articles by Reeve, N. G. Articles by Sumner, M. E.

Lime Requirements of Natal Oxisols Based on Exchangeable Aluminum¹

ABSTRACT

The exchangeable Al status of eight Natal Oxisols was found to be a suitable criterion for the measurement of lime requirement defined as the amount of lime necessary for maximum crop production. The principal function of lime in these soils was to eliminate Al toxicity; it had little or no effect on P availability. A "critical value" for exchangeable Al below which trudan (Sorghum sudanense) did not respond to lime application was found. On the average the amount of lime necessary for maximum growth and exchangeable Al control was approximately one-sixth the amount required to raise the soil pH to 6.5.

¹ Contribution from the Departments of Soil Science, Cedara College of Agriculture and University of Natal, Pietermaritzburg, S. Africa. Supported in part by the Department of Agricultural Technical Services of the Republic of South Africa.

² Research Soil Scientist and Senior Lecturer, respectively.

Received for publication October 3, 1969. Accepted for publication March 6, 1970.