Tapioca Water Requirement Calculator
Work out the seasonal and per-irrigation water requirement of tapioca (cassava) (FAO-56 ETc = ET₀ × Kc, peak Kc 1) for your field, climate, soil and irrigation method.
Cassava tolerates drought by shedding leaves and resuming when water returns; irrigation in dry spells (especially first 3–4 months) boosts tuber bulking. Avoid waterlogging, which rots tubers.
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 Tapioca Water Requirement Calculator to turn the FAO-56 crop coefficients for tapioca (cassava) into a real seasonal water volume and an irrigation interval for their own field — no agronomy tables, works offline.
About Tapioca Water Requirement Calculator
Cassava is famously drought-tolerant, needing 800–1200 mm over its long cycle and surviving dry spells that kill other crops. This calculator uses the FAO-56 method — crop evapotranspiration ETc = ET₀ × Kc — with tapioca (cassava)'s own crop coefficients (Kc 0.5 initial, 1 mid-season, 0.5 late) across a 330-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 Tapioca 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 Tapioca Water Requirement Calculator?
- ✓Uses tapioca (cassava)'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 tapioca (cassava) need?+
Cassava is famously drought-tolerant, needing 800–1200 mm over its long cycle and surviving dry spells that kill other crops. The exact figure depends on climate and season length; this tool sums ET₀ × Kc across the crop's 330-day growth stages for your conditions.
How drought tolerant is cassava?+
Exceptionally — it sheds leaves and pauses growth in drought, then recovers. This makes it a famine-reserve crop, finishing on 800–1200 mm where many crops fail.
When does irrigating cassava help most?+
In the first 3–4 months (establishment and early bulking) and during prolonged dry spells. Good early moisture sets tuber number; the deep roots handle later stress.
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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