Irrigation & Spraying

Irrigation, drip flow, rainfall and spray tank mixes.

• Drip Irrigation Flow Calculator Total flow, application rate and run time for a drip system, from emitter flow and spacing.
• Evapotranspiration Calculator (Hargreaves) An estimate of reference evapotranspiration (ET₀) from temperature, latitude and date, using the Hargreaves-Samani equation.
• Irrigation Water Requirement Calculator How much water a crop needs over a period, from evapotranspiration, crop coefficient, rainfall and irrigation efficiency.
• Pesticide Dilution Calculator How much product to add to a knapsack or hand sprayer, from the dilution rate on the label.
• Rainfall to Volume Calculator Turn millimetres or inches of rain on a field, garden or yard into litres, gallons and cubic metres.
• Spray Tank Mix Calculator Product per tank, hectares or acres per tank and tanks for a field, from the rate on the label and your water volume.
• Sprinkler Run Time Calculator How long to run sprinklers to apply a set depth of water, from a catch-cup test or the head flow and spacing.