Fertilizer guide · Bangladesh

Tamarind (Tetul): 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 Tamarind (Tetul) tree (0–1 years) about 163 g of urea, 249 g of TSP and 151 g of MOP (potash) a year. A fully grown one (over 20 years) needs about 1,196 g of urea, 1,245 g of TSP and 1,205 g of MOP a year. Put the yearly dose on in 3 equal turns: مئ–جون, ستمبر–اکتوبر, فروری–مارچ.

Two tables: the BARI variety and the BAU sweet and sour types.

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.

Group 1 of 2 · yield goal about 100 kg of fruit per tree (for a tree over 20 years old)

BARI tamarind (Tentul-1), for trees over 20 years old.

Varieties in this group: BARI Tentul-1.

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)0149010–
0–1 years old1632491511015 · 5 · 2
2–4 years old3263984021520 · 5 · 2
5–7 years old5434986032030 · 8 · 4
8–10 years old7617478032040 · 10 · 5
11–15 years old9789961,0042550 · 10 · 8
16–20 years old1,0871,1211,1052555 · 12 · 10
Over 20 years old1,1961,2451,2053060 · 12 · 10

Source: BARC, Fertilizer Recommendation Guide 2024, page 132.

Group 2 of 2 · yield goal about 30 kg of fruit per tree (for a tree over 8 years old)

BAU sweet and sour tamarind (Tatul-1 and Tatul-2), for trees over 8 years old.

Varieties in this group: BAU Tatul-1, BAU Tatul-2.

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)0007–
1–2 years old130149151–15 · – · –
3–4 years old174199201720 · – · –
5–6 years old217249251925 · – · –
7–8 years old3042993011030 · – · –
Over 8 years old4353984021240 · – · –

Source: BARC, Fertilizer Recommendation Guide 2024, page 133.

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 3 equal turns: مئ–جون, ستمبر–اکتوبر, فروری–مارچ.

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

Fertilizer calculator questions

How much urea does a Tamarind (Tetul) tree need?

According to BARC's Fertilizer Recommendation Guide 2024, about 163 g a year for a young tree (0–1 years), rising to about 1,196 g for a fully grown tree (over 20 years). The dose goes up with the age of the tree.

How much TSP and MOP does a Tamarind (Tetul) tree need?

About 249 g of TSP and 151 g of MOP a year for a young tree (0–1 years), and about 1,245 g of TSP and 1,205 g of MOP for a fully grown tree (over 20 years), according to BARC's Fertilizer Recommendation Guide 2024.

When should I put fertilizer on Tamarind (Tetul)?

Put the yearly dose on in 3 equal turns: مئ–جون, ستمبر–اکتوبر, فروری–مارچ. Put it around the tree under the spread of the branches, mix it into the soil and water it in.

Fertilizer doses for other crops