Plant nutrition and yield quality of arabica coffee 2. Effect of nitrogen, phosphorus and micronutrient on growth and yield of unshaded coffee plants
1993
Kochakorn Pomnoi | Manas Sanmaneechai | Pittaya Sruamsiri (Chiang Mai Univ., Chiang Mai (Thailand). Faculty of Agriculture. Dept. of Horticulture)
Effects of nitrogen, phosphorus 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 phosphorus and micronutrient fertilizers. Phosphorus and micronutrients showed however no significant effect on plant growth.
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