Question: asking about the fertilizer dose of arecanut tree 
(18 years old).
Answer: advised him to apply urea 110 gm, ssp 125 gm, mop 150 gm, compost 6-7 kg, borax 25 gm per plant in a ring prepared at a distance of 50 cm away from the base of the plant. again apply same amount during march/april also.