questions: asking about the control  measure to control barren nut formation of coconut. 
 answers: suggested 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 in two equal split doses twice in a year to a trench of 30 cm width and 15 cm depth at a radius of 1-1.75 meter away from the main trunk.