questions: asking about the proper growth and development in mango at the age of more than 30 years 
 answers: suggested to apply recommended fertilizer like-urea@150 gram/plant,ssp@120 gram/plant,mop@100 gram/plant,fym @10 kilogram/plant.fertilizer should be applied in two equal halves twice in a year to a trench of 10-12 centimeter depth,30 centimeter breadth with a radius of 60 centimeter  away from the main trunk