questions: asking for the fertilizers dosages in terms of per tree and the procedure of application in the 4th year stage of orange trees. 
 answers: 1.320,3000 and 668 grams of urea, single super phosphate and muriate of potash respectively has been suggested along with 20 kilo grams of fym in terms of per tree of orange in the 4th year stage which all to be applied in two equal split doses. once in april & the other dose in october. it should be applied leaving about 15-45 cm space around the tree trunk and well beyond the canopy spread. after application, it should be incorporated into the soil by light or shallow hoeing.