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Lime Requirements of Natal Oxisols Based on Exchangeable Aluminum
Author(s) -
Reeve N. G.,
Sumner M. E.
Publication year - 1970
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/sssaj1970.03615995003400040017x
Subject(s) - lime , oxisol , soil water , mathematics , environmental science , sorghum , agronomy , soil science , biology , paleontology
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.