Free calculators for zinc sulphate, borax, gypsum and lime — exact rates, bags and cost from your soil test.
Scale zinc sulphate (21% Zn) to your field, see the Zn delivered, bag count and cost from the recommended 25 kg/ha rate.
Scale borax (10.5% B) to your field, see the B delivered, bag count and cost from the recommended 10 kg/ha rate.
Scale agricultural gypsum (18.6% S) to your field, see the S delivered, bag count and cost from the recommended 250 kg/ha rate.
Estimate how much agricultural lime to apply to raise an acidic soil's pH to the target, based on soil pH, texture and field area.
Interpret your soil-test report — pH, organic carbon, N, P, K — into Low/Medium/High ratings and plain-language fertilizer guidance.
Value the N-P₂O₅-K₂O in farmyard manure (fym) (~0.5:0.25:0.5%) and the urea, DAP and MOP it replaces, with first-year nitrogen availability accounted for.
Mix zinc sulphate to the right strength (0.5% w/v) for any tank or knapsack volume, with the per-15 L dose worked out for you.
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