Question: query regarding how and what amount of fertilizer to be use in bottle gourd cultivation. 
Answer:  compost @ 3 t, urea 16kg, super 45kg and potash22kg/bigha. half of urea and full doses of fym, super and potash should be applied as basal and the remaining half of urea to be top dressed at fruit-set or if you want to apply in individual plant  then you have to apply the recommended doses of fertilizer urea 30 gram, super 70 gram potash 40 gram/ plant along with 500 gram of compost in ring method 30 cm away from the plant.