Fertilizer guide · Bangladesh

Star fruit (Kamranga): how much fertilizer per tree?

Urea, TSP and MOP for each age of the tree, from BARC's Fertilizer Recommendation Guide 2024.

Short answer

BARC's Fertilizer Recommendation Guide 2024 gives a young Star fruit (Kamranga) tree (0–1 years) about 217 g of urea, 249 g of TSP and 201 g of MOP (potash) a year. A fully grown one (over 10 years) needs about 978 g of urea, 647 g of TSP and 552 g of MOP a year. Put the yearly dose on in 2 equal turns: abril–maio e setembro–outubro.

Dose for each age

Find the age of your tree in the first column, counted in years since planting. The figures are grams per tree for one year; the first row is the planting pit. For an orchard, multiply by the number of trees and divide by 1,000 to get kilograms, or let the calculator below do it.

Yield goal about 250 kg of fruit per tree (for a tree over 10 years old)

Varieties in this group: BARI Kamranga-1, BARI Kamranga-2, BAU Kamranga-1, BAU Kamranga-2, BAU Kamranga-3.

grams per tree
Age of tree (years)	Urea (g)	TSP (g)	MOP (g)	Organic manure (kg)	S, Zn, B (g)
Before planting (in the pit)	0	299	0	15	–
0–1 years old	217	249	201	10	15 · – · 2
2–4 years old	435	374	301	15	20 · 5 · 5
5–7 years old	543	498	402	20	35 · 5 · 5
8–10 years old	761	598	502	20	40 · 8 · 8
Over 10 years old	978	647	552	25	50 · 10 · 8

Source: BARC, Fertilizer Recommendation Guide 2024, page 125.

When to apply

Mix it into the planting pit 10–20 days before planting the sapling, then water it in.

Put the yearly dose on in 2 equal turns: abril–maio e setembro–outubro.

Put it around the tree under the spread of its branches, leaving some space from the trunk, mix it into the soil and water it in. Young trees get the same turns with smaller amounts.

Using DAP instead of TSP

DAP has the same 46% phosphate as TSP, so use the TSP figure as the DAP figure. DAP also carries 18% nitrogen (about 0.4 kg of urea saved per kg of DAP). The guide does not subtract it and neither do these tables, but you can take it off the urea if you want to.

How these numbers are worked out

BARC's guide gives grams of nitrogen (N), phosphorus (P) and potassium (K) per tree for each age. We convert P to P₂O₅ (× 2.29) and K to K₂O (× 1.21), then divide by what is in the bag: urea 46% N, TSP 46% P₂O₅, MOP 60% K₂O. The guide's amounts are for the whole year; split them as shown under “When to apply”.

These are the guide's general doses for a healthy, well-managed tree, not a prescription for your orchard. Soil, variety, rainfall and crop load change what a tree needs. Check with your local Department of Agricultural Extension or horticulture officer.

Calculate for your orchard

Choose the crop, the age of your trees and how many you have, and get the kilograms and bags of fertilizer to buy, with a PDF to share.

Open the fertilizer calculator

Perguntas sobre a calculadora de adubo

How much urea does a Star fruit (Kamranga) tree need?

According to BARC's Fertilizer Recommendation Guide 2024, about 217 g a year for a young tree (0–1 years), rising to about 978 g for a fully grown tree (over 10 years). The dose goes up with the age of the tree.

How much TSP and MOP does a Star fruit (Kamranga) tree need?

About 249 g of TSP and 201 g of MOP a year for a young tree (0–1 years), and about 647 g of TSP and 552 g of MOP for a fully grown tree (over 10 years), according to BARC's Fertilizer Recommendation Guide 2024.

When should I put fertilizer on Star fruit (Kamranga)?

Put the yearly dose on in 2 equal turns: abril–maio e setembro–outubro. Put it around the tree under the spread of the branches, mix it into the soil and water it in.