Ferrous sulphate Calculator
Scale ferrous sulphate (19% Fe) to your field, see the Fe delivered, bag count and cost from the recommended 50 kg/ha rate.
Soil-applied iron is often quickly oxidised and locked up on calcareous soils — foliar ferrous sulphate sprays usually work better there. Use the soil dose on acidic/neutral soils or band with FYM.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Farmers and soil-test labs use the free Ferrous sulphate Calculator to turn a per-hectare ferrous sulphate recommendation into the exact quantity, bag count and cost for their own field in seconds.
About Ferrous sulphate Calculator
Iron chlorosis yellows the young leaves of rice, fruit and high-pH-soil crops while veins stay green. Ferrous sulphate heptahydrate carries 19% Fe. On calcareous soils soil iron locks up fast, so this tool helps size both the soil dose and the FYM band that protects it from oxidation.
How to use Ferrous sulphate Calculator
- 1Enter your field area and unit.
- 2Pick the soil rating or situation that matches your soil test.
- 3Read the ferrous sulphate quantity, Fe delivered, bags and cost, then follow the application note.
Why use Ferrous sulphate Calculator?
- ✓Scales the recommended ferrous sulphate rate to hectares, acres or bigha
- ✓Shows the actual Fe nutrient delivered, not just product weight
- ✓Estimates cost and bag count so you can budget the purchase
- ✓Free, instant and fully in-browser — works offline in the field
Frequently asked questions
How much ferrous sulphate per acre?+
Soil test Low Fe: 50 kg/ha (20.2 kg/acre); Marginal: 25 kg/ha (10.1 kg/acre). Soil-applied iron is often quickly oxidised and locked up on calcareous soils — foliar ferrous sulphate sprays usually work better there.
How much Fe does ferrous sulphate contain?+
Ferrous sulphate carries about 19% Fe, so each 100 kg supplies 19.0 kg of Fe. The calculator multiplies your applied quantity by this to show the true nutrient delivered.
When and how should I apply it?+
Soil-applied iron is often quickly oxidised and locked up on calcareous soils — foliar ferrous sulphate sprays usually work better there. Use the soil dose on acidic/neutral soils or band with FYM.
Is the tool free and private?+
Yes — free, no sign-up, and all calculation runs in your browser, so it works offline in the field and your data never leaves the device.
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