Magnesium sulphate Calculator
Scale magnesium sulphate (epsom) (9.6% Mg) to your field, see the Mg delivered, bag count and cost from the recommended 50 kg/ha rate.
Magnesium deficiency yellows older leaves between the veins, common on sandy, acidic and high-K soils. Heavy MOP/potash use induces it. Foliar Epsom (1–2%) corrects acute deficiency fast.
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 Magnesium sulphate Calculator to turn a per-hectare magnesium sulphate (epsom) recommendation into the exact quantity, bag count and cost for their own field in seconds.
About Magnesium sulphate Calculator
Magnesium deficiency yellows the older leaves between the veins, typically on sandy, acidic or heavily potash-fed soils. Epsom salt (magnesium sulphate heptahydrate) carries 9.6% Mg. This tool sizes the soil rate and the magnesium delivered; for acute cases a 1–2% foliar Epsom spray acts fastest.
How to use Magnesium sulphate Calculator
- 1Enter your field area and unit.
- 2Pick the soil rating or situation that matches your soil test.
- 3Read the magnesium sulphate (epsom) quantity, Mg delivered, bags and cost, then follow the application note.
Why use Magnesium sulphate Calculator?
- ✓Scales the recommended magnesium sulphate (epsom) rate to hectares, acres or bigha
- ✓Shows the actual Mg 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 magnesium sulphate (epsom) per acre?+
Soil test Low Mg: 50 kg/ha (20.2 kg/acre); Marginal: 25 kg/ha (10.1 kg/acre). Magnesium deficiency yellows older leaves between the veins, common on sandy, acidic and high-K soils.
How much Mg does magnesium sulphate (epsom) contain?+
Magnesium sulphate (Epsom) carries about 9.6% Mg, so each 100 kg supplies 9.6 kg of Mg. The calculator multiplies your applied quantity by this to show the true nutrient delivered.
When and how should I apply it?+
Magnesium deficiency yellows older leaves between the veins, common on sandy, acidic and high-K soils. Heavy MOP/potash use induces it. Foliar Epsom (1–2%) corrects acute deficiency fast.
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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