Cumin Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of cumin (jeera) (FAO-56 ETc = ET₀ × Kc, peak Kc 0.95) for your field, climate, soil and irrigation method.
Cumin needs careful light irrigation — dense, humid, over-watered canopies trigger Alternaria blight. Avoid evening irrigation and waterlogging; protect seed-fill with measured moisture.
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 Cumin Water Requirement Calculator to turn the FAO-56 crop coefficients for cumin (jeera) into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Cumin Water Requirement Calculator
Cumin is a low-water rabi spice needing 250–350 mm, where over-irrigation invites the blight that destroys the crop. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with cumin (jeera)'s own crop coefficients (Kc 0.4 initial, 0.95 mid-season, 0.3 late) across a 105-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 Cumin Water Requirement 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 Cumin Water Requirement Calculator?
- ✓Uses cumin (jeera)'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 cumin (jeera) need?+
Cumin is a low-water rabi spice needing 250–350 mm, where over-irrigation invites the blight that destroys the crop. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 105-day growth stages for your conditions.
Why is over-irrigation dangerous for cumin?+
Lush, humid cumin canopies are highly prone to Alternaria blight, which can wipe out the crop. Light, careful irrigation (and avoiding evening watering) keeps the canopy dry and healthy.
How much water does cumin need?+
Only 250–350 mm over its short rabi life on light soils. Measured moisture through seed development gives yield without the disease risk of heavy irrigation.
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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