Tropical and subtropical fruits (2+1)

Manuring

The bearing tree should be given the fertilizer dose at the ratio of 550 gm: 370 gm: 550 gm NPK/plant/year, depending upon its performance.
Graded dose of fertilizers can be applied from 1^st year to 10^th year.
Fertilizers should be applied in a ring 30-40 cm wide just below the canopy of the tree at a distance of at least 1-2 m from the trunk.
As sweet orange shows deficiency symptoms of many micronutrients it is always better to give a composite spray of:

Zinc sulphate	2.25 kg
Copper sulphate	1.45 kg
Magnesium sulphate	0.90 kg
Manganese sulphate	0.90 kg
Ferrous sulphate	0.90 kg
Boric acid	0.45 kg
Slaked lime	4.00 kg
Urea	4.50 kg
Applied in 450 liters of water 2-4 sprays every year on the new flush of fully grown leaves.

Two sprays minimum during the new flush is recommended

• 1^st spray-on new flush
• 2^nd spray-after the leaves on new flush fully expand.