IrriPlan

1Location & Reference Evapotranspiration

📍

Location

Search city, region, or coordinates

2Soil Characterization

🪨

Texture & Classification

USDA Texture Class

Enter particle size percentages (must sum to 100%)

Sand%

Silt%

Clay%

Sum: 100%

⚠ Sand + Silt + Clay must equal 100%

Loam

Sand 42% · Silt 38% · Clay 20%

✏️

Soil Parameters (auto-estimated, editable)

Water retention

θ_FC — Saxton & Rawls PTF↺ from PTF

θ_PWP — Saxton & Rawls PTF↺ from PTF

Physical

Bulk density (g/cm³)↺ default

K_sat (mm/day)↺ default

Derived

θ_sat

—

Porosity

—

van Genuchten shape

α (kPa⁻¹)↺ refit from PTF

n↺ refit from PTF

📐

USDA Texture Triangle

📊

Soil Hydraulic Summary

Soil-water characteristic curve

Step 2 of 4

3Crop Parameters & Irrigation System

🌿

Crop Parameters

Crop

Growth stage

Kc override

Kc active 1.00

🌿 Recommended MAD for this crop: 50%

Root depth (cm)

Irrigation strategy

MAD — Management Allowable Deficit

💧 Initial soil moisture (today)

Unit

Initial SM (% FC)

Starting at 80% FC

💧

Drip Irrigation System

Field area (ac)

Emitter discharge (gph)

Emitter spacing (in)

Row spacing (ft)

Efficiency (%)

📋

Kc Reference — —

StageTabulated Kc

Initial—

Development—

Mid-season—

Late season—

Active Kc (this stage)—

ETc forecast (16 days)

ETc

Cumulative ETc

⚖️

Water Balance Preview

Step 3 of 4

4Irrigation Schedule & Soil Moisture Outlook

📅

Complete steps 1–3, then click Calculate schedule