Match water to the crop, not the guess.

28 Irrigation — Field & Crop calculators

Every calculator in this category, by its reference code. Running them needs a Tenselo subscription — subscriptions open soon.

• IRR-001 SAR / Sodium Hazard

  Sodium adsorption ratio and infiltration hazard for irrigation water (FAO-29)

• IRR-002 Drip Lateral Design

  Pick the dripline, prove the run, schedule the block

• IRR-003 Drip Maintenance (Dosing & Flushing)

  Peroxide / chlorine / acid dosing-pump sizing + line-flush flow (Netafim method)

• IRR-004 Emitter Clogging Risk Score

  Physical/chemical/biological clogging risk and filtration recommendation

• IRR-005 Solid Set Lateral Design

  Max run of a coupled aluminium lateral with riser-mounted impacts - 20% rule, stepwise hydraulics from the sprinkler database

• IRR-006 Centre Pivot Design

  Full centre-pivot machine selection & design report -- tower/span schedule, pipe package, gearbox/drive, auto sprinkler pack, end gun, pump duty, application rate vs soil intake, energy and BOM

• IRR-007 Hand-Move Sprinkler System

  Hand-shift / portable lateral design -- precipitation rate, set time, sets and moves per day, lateral positions, days per cycle and keep-up vs the irrigation interval

• IRR-008 Lawn / Turf Water Management

  Turf watering schedule -- weekly water use, depth and run time per watering, waterings per week, and cycle & soak to stop runoff on heavy soils

• IRR-009 Sprinkler Spacing & Precipitation

  Head/row spacing for wind, arc-aware precipitation, run time and CU / DU / SC uniformity estimates from the sprinkler database

• IRR-010 Travelling Irrigator

  Hard-hose, soft-hose and boom travellers -- net application from gun flow, lane spacing and travel speed, run time, whole-field coverage, hose friction and the pump duty to drive it

• IRR-011 Travelling Irrigator Lane Planner

  Lane spacing, speed, runtime and application depth for a travelling gun

• IRR-012 Distribution Uniformity & Catch-Can Audit

  DU(lq), Christiansen CU & precipitation rate from catch-can readings (golf / turf / irrigation audit)

• IRR-013 Frost Protection Sprinkler Rate

  Overhead sprinkler application rate & system flow for frost protection (latent-heat / FAO guidance)

• IRR-014 Furrow / Border Surface Irrigation

  Gross/net depth, efficiency & cut-off time for furrow or border surface irrigation (volume balance)

• IRR-015 Irrigation Scheduling Calculator

  ET-based worst-case schedule: drip / micro / spray / rotor, any AU region

• IRR-016 Leaching Requirement (Salinity)

  Leaching fraction & extra water depth for salt balance (FAO-29 Ayers & Westcot)

• IRR-017 Soil Moisture Deficit

  Soil-water deficit, RAW trigger & irrigation required (mm) from soil type, root depth & current moisture (FAO-56)

• IRR-018 Valve Block Runtime Scheduler

  Valve runtimes, shifts and daily schedule from crop demand

• IRR-019 Chemigation Tank Batch Runtime

  How long a chemical batch lasts and whether it covers the set

• IRR-020 Fertigation Injection Point Mixer Check

  Whether injected chemical mixes before the first valve/emitters

• IRR-021 Centre Pivot Pumping Cost per ML and per mm

  Operating cost per hour, per ML and per mm applied for a centre pivot

• IRR-022 Irrigation Mainline Energy Optimiser

  Compare pipe sizes by friction, pump energy, cost and payback

• IRR-023 Irrigation Uniformity Loss Cost

  Extra water, energy and yield-risk cost of low distribution uniformity

• IRR-024 System Capacity & Irrigable Area

  Quick sizing -- the flow needed to irrigate an area, or the area a flow can keep watered, from peak crop water use and the operating hours

• IRR-025 Dam Aeration Sizing

  Fountain / surface / venturi-jet aerator selection & number of units for a dam

• IRR-026 Hunter FX Luminaire Lighting

  FX Luminaire LED garden lighting: fixture load, cable size & transformer (AU range)

• IRR-027 Irrigation Storage Tank Sizing

  Minimum tank fed from a town main (with fire reserve, other draws & pump duty) - or the original dam/ML buffer

• IRR-028 Centre Pivot Sprinkler Pack Calculator

  Design or check a complete centre-pivot sprinkler package and build a manufacturer BOM -- annular-area flow split, chart-verified Nelson / Senninger nozzle selection, pressure/regulator checks, outlet schedule + BOM