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Effects of NPK Fertilizers on young Coconut (Cocos nucifera) on a Sandy Soil in Sri Lanka

Published online by Cambridge University Press:  03 October 2008

P. Loganathan  and
T. S. Balakrishnamurti
P. Loganathan
Affiliation:
Coconut Research Institute of Sri Lanka, Lunuwila, Sri Lanka
T. S. Balakrishnamurti
Affiliation:
Coconut Research Institute of Sri Lanka, Lunuwila, Sri Lanka
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Summary

In a 4 × 4 × 4 NPK field experiment with coconut on a sandy soil, N increased girth, height and leaf production during the pre-bearing period, but phosphorus (up to 6½ years) and K (up to 3½ years) had no effect on any vegetative growth parameters. The rates of fertilizers for optimum copra and nut yield (13 to 16 years) were 0.35, 0.73 and 0.64 kg N, PO and KO/palm/ year respectively. The high P requirement was due to the low solubility of the saphos phosphate in these sandy soils. A positive N × P interaction was also observed.

Type
Research Article
Information
Experimental Agriculture , Volume 16 , Issue 1 , January 1980 , pp. 41 - 48
Copyright
Copyright © Cambridge University Press 1980

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References

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