Ag Water Calculator

Water Requirement Formula:

\[ Water (l) = \frac{ET (mm) \times Area (m²) \times Crop\ factor}{Efficiency} \]

Evapotranspiration (ET):

Area:

m²

Crop Factor:

Efficiency:

Water Requirement:

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1. What is Agricultural Water Requirement?

Agricultural water requirement calculation helps determine the precise amount of water needed for crops based on evapotranspiration rates, crop characteristics, and irrigation efficiency. This ensures optimal water usage while maintaining crop health.

2. How Does the Calculator Work?

The calculator uses the water requirement formula:

\[ Water (l) = \frac{ET (mm) \times Area (m²) \times Crop\ factor}{Efficiency} \]

Where:

\( ET \) — Evapotranspiration rate (mm)
\( Area \) — Cultivation area (m²)
\( Crop\ factor \) — Crop-specific water requirement coefficient
\( Efficiency \) — Irrigation system efficiency (%)

Explanation: The equation calculates the actual water needed by considering environmental evaporation, crop characteristics, and the efficiency of the irrigation system.

3. Importance of Water Calculation

Details: Accurate water calculation is crucial for sustainable agriculture, preventing water waste, ensuring crop health, and maximizing yield while conserving water resources.

4. Using the Calculator

Tips: Enter evapotranspiration in mm, area in square meters, crop factor (typically 0.5-1.3), and irrigation efficiency as a percentage. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is evapotranspiration (ET)?
A: ET is the sum of water evaporation from soil and transpiration from plants, representing the total water loss from a crop field.

Q2: How do I determine the crop factor?
A: Crop factors are specific to plant types and growth stages. Consult agricultural extension services or crop-specific guidelines for accurate values.

Q3: What is typical irrigation efficiency?
A: Efficiency varies by system: drip irrigation (85-90%), sprinklers (70-85%), flood irrigation (50-70%).

Q4: Can this calculator be used for any crop?
A: Yes, but you need the appropriate crop factor for your specific crop and growth stage for accurate results.

Q5: How often should I recalculate water needs?
A: Water requirements change with weather conditions and crop growth stage. Recalculate weekly or when significant weather changes occur.