PLANT NUTRITION AND YIELD QUALITY OF ARABICA COFFEE 2. EFFECT OF NITROGEN, PHOSPHOROUS AND MICRONUTRIENT ON GROWTH AND YIELD OF UNSHADED COFFEE PLANTS
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Abstract
Effects of nitrogen, phosphorous and micronutrients on growth and yield were studied on Arabica coffee plant (4 years of age) grown unshaded at Khun-Changkian Highland Agricultural Research and Training Centre, Chiang Mai. Nitrogen fertilizer at the rate of 16-32 kg N/rai could significantly increase both plant height and node number. Nitrogen could also enhance yield by increase bean dry weight at the same fruit size. This effect of nitrogen could also achieve through phosphorous and micronutrient fertilizers. Phosphorous and micronutrients showed however no significant effect on plant growth.
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References
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Cervellini, G.S., S.V. Toledo, A.J. Reis and T.R. Rocha. (1989). Nitrogen fertilizer for coffee: Rates and application method of mitrochalk. Hort. Abstr. 59(1): 78.
Haarer, A.E. (1962). Modern Coffee Production. Leonard Hill Ltd., London 495 p.
Lampaopong, B., D. Manajuti and J. Sukasem. (1985). A study on land characteristics of coffee cultivation in northern Thailand. Proceedings of coffee research reports on Arabica coffee growing and production. The Highland Coffee Research and Development Centre, Faculty of Agriculture, Chiang Mai University, Thailand. p.58-81.
Miskiu, E.E., C.R. Donald and N.M. Dale. (1972). Inheritance of physiological effects of stomatal frequency in barley. Crop. Sci. 12: 780-783.
Mitchell, H.W. (1988). Cultivation and Harvesting of the Arabica Coffee Tree. In Ctarke, R.J. and R. Macrae (eds.). Coffee Volume 4. Agronomy. Elsevier Applied Science, London and New York.
Reuter, D.J. and J.B. Robinson. (1986). Plant Analysis: An Interpretation, Manual. Inkata Press, Melbourne, Sydney 218 p.
River, R. and J.R. Martin. (1988). NPK fertilization of coffee trees growing at full sunlight on a red ferrallitic soil of Cuba. In 12th International Scientific Colloquium on Coffee. Hort. Abstr. 59 (7): 700.
Sanchez, P.A. (1976). Properties and Management of Soils in the Tropics. John Wiley & Sons. Inc., New York. 618 p.
Snoeck, J. and P. Jadin. (1990). Calculation method to study mineral fertilization of coffee trees based on soil analyses. Hort. Abstr. 61(1): 96.
Tisdale, S.L., W.L. Nelson and J.D. Beaton. (1985). Soil fertility and Fertilizers. 4th ed. Mcmillan. Co., Inc. New York. 694 p.