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Liming Needs of Sweet Potato in Malaysian Acid Peat

Published online by Cambridge University Press:  03 October 2008

W. Y. Chew ,
K. T. Joseph ,
K. Ramli  and
A. B. A. Majid
W. Y. Chew
Affiliation:
Malaysian Agricultural Research and Development Institute (MARDI), Jalan Kebun, Kelang, Selangor, Malaysia
K. T. Joseph
Affiliation:
Malaysian Agricultural Research and Development Institute (MARDI), Jalan Kebun, Kelang, Selangor, Malaysia
K. Ramli
Affiliation:
Malaysian Agricultural Research and Development Institute (MARDI), Jalan Kebun, Kelang, Selangor, Malaysia
A. B. A. Majid
Affiliation:
Malaysian Agricultural Research and Development Institute (MARDI), Jalan Kebun, Kelang, Selangor, Malaysia
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Summary

In two field experiments, sweet potato showed symptoms of lime deficiency, and consequently produced extremely low DM, at the natural pH of local peat (3.5–3.7). Liming to increase pH remarkably increased tuber and vine dry matter to pH 5.5 and harvest index to pH 3.8, but higher pH values decreased dry matter and harvest index. Tuber and vine yields generally decreased with continuous monocropping, probably because of increasing infestation with weevils (Cylas formicarius) and other pests, and depletion of available nutrients.

Type
Research Article
Information
Experimental Agriculture , Volume 18 , Issue 1 , January 1982 , pp. 65 - 71
Copyright
Copyright © Cambridge University Press 1982

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References

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