Cabbage Deficit Irrigation Calculator
Work out the seasonal and per-irrigation water requirement of cabbage (deficit) (FAO-56 ETc = ET₀ × Kc, peak Kc 0.9) for your field, climate, soil and irrigation method.
Take the water cut from the vegetative phase and protect head formation. Deficit irrigation maximises yield-per-drop, not per-hectare — best where water, not land, is scarce. Mild stress can even firm heads.
Indicative planning figures based on published research averages. Local soil tests, varieties and weather change actual requirements — confirm with your agronomist or extension officer.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
Farmers and irrigation planners use the free Cabbage Deficit Irrigation Calculator to turn the FAO-56 crop coefficients for cabbage (deficit) into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Cabbage Deficit Irrigation Calculator
Deficit irrigation of cabbage applies ~80% of full ETc to stretch limited water across more area, protecting only head formation. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with cabbage (deficit)'s own crop coefficients (Kc 0.6 initial, 0.9 mid-season, 0.85 late) across a 95-day season. Pick your climate band (which sets reference ET₀), irrigation method (drip, sprinkler, pivot or surface — each with its own efficiency) and soil texture, and it returns the seasonal water need in cubic metres, the peak daily demand, the net depth per irrigation and how many days to wait between irrigations.
How to use Cabbage Deficit Irrigation Calculator
- 1Enter your field area and choose the climate band matching your season.
- 2Select your irrigation method and soil texture.
- 3Read the seasonal water volume, peak daily demand and irrigation interval, then follow the scheduling note.
Why use Cabbage Deficit Irrigation Calculator?
- ✓Uses cabbage (deficit)'s real FAO-56 Kc curve, not a flat factor
- ✓Accounts for drip / sprinkler / pivot / surface efficiency
- ✓Gives seasonal volume, peak daily need and an irrigation interval
- ✓Free, instant and fully in-browser — works offline in the field
Frequently asked questions
How much water does cabbage (deficit) need?+
Deficit irrigation of cabbage applies ~80% of full ETc to stretch limited water across more area, protecting only head formation. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 95-day growth stages for your conditions.
Can cabbage be grown under deficit irrigation?+
Yes — applying about 80% of full crop water, with the cut taken from the vegetative phase and head formation protected, spreads limited water over more area with only a small per-head yield dip.
What is the risk of deficit irrigation in cabbage?+
Stressing the crop during head formation gives small, loose heads. Confine the deficit to the leafy growth phase and keep moisture adequate once heading begins.
What is ET₀ and Kc?+
ET₀ (reference evapotranspiration) is how fast a standard grass surface loses water in your climate. Kc (crop coefficient) scales it to a specific crop and growth stage. Crop water use ETc = ET₀ × Kc — the basis of FAO-56 irrigation scheduling.
Is this calculator 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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