Fertigation Calculator: Tank, Ratio & Daily Dose.

No. Enter your actual operating days per year. This tool multiplies the entered daily product mass by those days and your price per tonne. If dosing changes by crop stage, calculate each stage separately and add the costs; repeating peak demand across all days is only a constant-rate scenario, not a crop recommendation. The initial price is a hypothetical example, not a local quotation.

Daily irrigation volume (area × application depth) is multiplied by the target nutrient concentration in the emitter line (ppm = g/m³). The result is the mass of nutrient element that must be dissolved each day, before conversion to product weight using the fertilizer's nutrient percentage.

Common commercial ratios are 1:100 and 1:200. A higher dilution ratio means a smaller injection flow but a more concentrated — and less soluble-safe — stock tank. The calculator shows the resulting stock concentration so you can check it against the fertilizer's solubility limit.

Tank autonomy sets refill labour and mixing frequency. Most commercial projects size tanks for 2–7 days of peak demand so operators are not mixing solution during every irrigation cycle.

No. It is a hydraulic and dosing scoping tool. Final recipes must reflect source-water analysis, target EC/pH, crop stage and antagonism between ions.

Take the daily nutrient mass, divide by the stock concentration your injector ratio implies, then multiply by the number of days of autonomy you want between mixes. Most commercial projects size 2–7 days of peak demand and then check the resulting concentration against the fertilizer's solubility limit at the coldest expected tank temperature.

Target concentration is set by crop, growth stage and irrigation frequency, not by the calculator. What the calculator answers is the consequence: how many kg/day of product that target implies, how concentrated the stock must be and what injection flow in L/h the pump has to deliver. Fix the agronomic target with your agronomist, then size the hardware here.

1:200 halves the injection flow, so the injector and its metering range are smaller, but the stock tank must be twice as concentrated and is more likely to hit a solubility or precipitation limit. 1:100 is the safer default for high-EC recipes and hard source water; 1:200 suits larger blocks where injection flow would otherwise be impractical.

Calcium reacts with sulphates and phosphates and will precipitate if concentrated together. Standard commercial practice is tank A for calcium nitrate, tank B for phosphates and sulphates, and a separate acid tank for pH control. Size each tank from its own daily mass — a single-tank layout only works with pre-blended, compatibility-tested products.

Injection flow in L/h, number and volume of stock tanks, injector ratio, peak irrigation flow, water analysis, EC/pH control requirement and the number of independently dosed zones. That set is enough for suppliers to quote comparable dosing units, filtration and controls instead of guessing your scope.

As a planning band, open-field drip fertigation runs roughly USD 400–1,500 per hectare for the head and distribution, polyhouse systems USD 2,000–6,000, high-tech greenhouse systems with EC/pH control USD 8,000–20,000, and recirculating hydroponic systems USD 20,000–45,000. Hard, brackish or recycled source water adds treatment on top. Set the system type and water quality above and the calculator returns the band for your own area, alongside the fertilizer cost per hectare per year from your volumes and price.

Yes, separately. Equipment appears as a CAPEX planning band per hectare driven by system class and water treatment. Fertilizer appears as annual tonnage and cost per hectare, derived from your area, application depth, target concentration, product nutrient content, operating days and the price per tonne you enter. The initial price is hypothetical; replace it with your dated delivered quotation.