Chickpea Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of chickpea (FAO-56 ETc = ET₀ × Kc, peak Kc 1) for your field, climate, soil and irrigation method.
Chickpea prefers to grow on conserved soil moisture; one irrigation at pre-flowering and another at pod development suffice where needed. Avoid heavy or frequent irrigation — it triggers wilt and excessive vegetative growth.
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 Chickpea Water Requirement Calculator to turn the FAO-56 crop coefficients for chickpea into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Chickpea Water Requirement Calculator
Chickpea is largely rain-fed and needs only 250–400 mm; over-irrigation does more harm than drought by causing rank growth and wilt. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with chickpea's own crop coefficients (Kc 0.4 initial, 1 mid-season, 0.35 late) across a 115-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 Chickpea 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 Chickpea Water Requirement Calculator?
- ✓Uses chickpea'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 chickpea need?+
Chickpea is largely rain-fed and needs only 250–400 mm; over-irrigation does more harm than drought by causing rank growth and wilt. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 115-day growth stages for your conditions.
Does chickpea need irrigation?+
Often little or none — it grows on stored rabi soil moisture. Where soils are light or rainfall failed, one irrigation at branching/pre-flowering and one at pod-fill are enough. Excess water causes wilt and rank growth.
Why does over-watering hurt chickpea?+
Chickpea is adapted to receding moisture; waterlogging starves its roots of oxygen, promotes Fusarium wilt and root rots, and pushes leafy growth at the expense of pods. Restraint out-yields generosity here.
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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