Precision Irrigation
Planning calculators for precision irrigation — estimates from industry-style inputs.
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Soil Moisture Deficit Calculator
Calculate soil moisture deficit and MAD-based irrigation triggers from sensor data, field capacity, and crop ET.
Variable Rate Irrigation Calculator
Calculate VRI prescription rates by management zone based on soil AWC, crop ET demand, and pivot flow capacity.
Subsurface Drip Design Calculator
Design SDI lateral layout from crop spacing, emitter specs, and peak ET to determine tape length, flow rates, and run times.
Irrigation Energy Cost Calculator
Calculate pumping energy cost from Total Dynamic Head, flow rate, pump and motor efficiency, and electricity or diesel prices.
Water Use Efficiency Calculator
Calculate crop water use efficiency, irrigation WUE, water productivity, and economic returns from irrigation vs. dryland farming.
Irrigation Audit Calculator
Calculate Distribution Uniformity (DU) and Christiansen's CU from catch can test data to evaluate irrigation system performance.
Drought Management Calculator
Plan deficit irrigation strategy using FAO yield-response model to minimize yield and revenue loss when water supply is limited.
Chemigation Calculator
Calculate fertigation and chemigation injection pump rates, product volumes, and costs for applying chemicals through irrigation systems.
Salinity Management Calculator
Calculate leaching requirement from irrigation water EC and crop salt tolerance using FAO guidelines, plus SAR and salinity hazard assessment.
Irrigation Return on Investment Calculator
Evaluate irrigation system ROI with NPV, IRR, payback period, and benefit-cost ratio from yield improvement, water savings, and energy savings.