Manganese sulphate Calculator
Scale manganese sulphate (30.5% Mn) to your field, see the Mn delivered, bag count and cost from the recommended 25 kg/ha rate.
Manganese deficiency hits wheat and soybean on sandy alkaline and over-limed soils. Seed treatment and foliar sprays are usually more efficient than soil application, which oxidises on high-pH soils.
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 Manganese sulphate Calculator to turn a per-hectare manganese sulphate recommendation into the exact quantity, bag count and cost for their own field in seconds.
About Manganese sulphate Calculator
Manganese deficiency shows as interveinal yellowing and 'grey speck' in wheat and oats on sandy, alkaline or over-limed soils. Manganese sulphate carries about 30.5% Mn. This tool scales the soil rate and reports the manganese delivered, though foliar sprays often beat soil application on high-pH ground.
How to use Manganese sulphate Calculator
- 1Enter your field area and unit.
- 2Pick the soil rating or situation that matches your soil test.
- 3Read the manganese sulphate quantity, Mn delivered, bags and cost, then follow the application note.
Why use Manganese sulphate Calculator?
- ✓Scales the recommended manganese sulphate rate to hectares, acres or bigha
- ✓Shows the actual Mn 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 manganese sulphate per acre?+
Soil test Low Mn: 25 kg/ha (10.1 kg/acre); Marginal: 12 kg/ha (4.9 kg/acre). Manganese deficiency hits wheat and soybean on sandy alkaline and over-limed soils.
How much Mn does manganese sulphate contain?+
Manganese sulphate carries about 30.5% Mn, so each 100 kg supplies 30.5 kg of Mn. The calculator multiplies your applied quantity by this to show the true nutrient delivered.
When and how should I apply it?+
Manganese deficiency hits wheat and soybean on sandy alkaline and over-limed soils. Seed treatment and foliar sprays are usually more efficient than soil application, which oxidises on high-pH soils.
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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