The nitrogen response curve for vegetatively propagated tea [Camellia sinensis] in the low country of Sri Lanka and its implications on fertilizer policy

Watson M., . (1984) The nitrogen response curve for vegetatively propagated tea [Camellia sinensis] in the low country of Sri Lanka and its implications on fertilizer policy. In: International Conference on Soils and Nutrition of Perennial Crops, 13-15 Aug 1984, Kuala Lumpur (Malaysia).

Data from IT field experiments carried out at different locations in the low country tea growing districts were used to study the response curve for N. Four model viz. Quadratic Square root Mitscherlich and Split line were tested on the pooled data. The best fit as judged by R2 was obtained with the quadratic model ie y = a + bx + cx2. This model accounted for 85.4% of the variation in yield over the range 0 - 540 kg N/ha. A simple economic analysis revealed that the present upper limit of N 300 kg/ha is far below the economic optimum. Higher rates of N are therefore warranted for high-yielding vegetatively propagated tea in the low country under the prevailing cost and market situation

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Abstract

Data from IT field experiments carried out at different locations in the low country tea growing districts were used to study the response curve for N. Four model viz. Quadratic Square root Mitscherlich and Split line were tested on the pooled data. The best fit as judged by R2 was obtained with the quadratic model ie y = a + bx + cx2. This model accounted for 85.4% of the variation in yield over the range 0 - 540 kg N/ha. A simple economic analysis revealed that the present upper limit of N 300 kg/ha is far below the economic optimum. Higher rates of N are therefore warranted for high-yielding vegetatively propagated tea in the low country under the prevailing cost and market situation

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Item Type:	Conference or Workshop Item (Paper)
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor. S597 P4I61 1984 Call Number
AGROVOC Term:	CAMELLIA SINENSIS
AGROVOC Term:	Fertilisers
AGROVOC Term:	Nitrogen
AGROVOC Term:	Vegetative propagation
AGROVOC Term:	Economic analysis
Geographical Term:	MALAYSIA
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:51
URI:	http://webagris.upm.edu.my/id/eprint/7414

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