Question: asking about the fertilizer dose of arecanut tree 
(more than 13 years old)
Answer: advised him to apply fertilizers such as urea 225 gm, ssp 250 gm, mop 270 gm, borax 50 gm, per plant alongwith compost 10-15 kg per plant. divide the amount into two parts and apply during march/april and october/november in ring method.