Question: asking for the fertilizer dose in terms of per plant of coconut in the 10th year stage.
Answer: suggested to maintain good drainage system and to apply recommended fertilizer dose like-urea@1.5 kilogram/plant,ssp@2.5 kilogram/plant,mop@1.75 kilogram/plant,borax@25 gram/plant.fertilizer should be applied twice in a year march april and september october respectively  in two equal split doses and also to spray planofix@1teaspoonful per 20 liters of water 7-10 days after flowering.