1. What is Potential Evapotranspiration of Crop?

Potential Evapotranspiration of Crop is the potential evaporation from soils plus transpiration by plants. It represents the maximum amount of water that would be evaporated and transpired if there were sufficient water available.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( ET \) — Potential Evapotranspiration of Crop (m/s)
• \( ETo \) — Reference Crop Evapotranspiration (m/s)

Explanation: The formula calculates the potential evapotranspiration for rice crops by multiplying the reference crop evapotranspiration by a factor of 1.1.

3. Importance of ET Calculation

Details: Accurate ET calculation is crucial for irrigation planning, water resource management, and crop yield optimization in agricultural practices.

4. Using the Calculator

Tips: Enter Reference Crop Evapotranspiration in meters per second. The value must be valid (ETo > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is Reference Crop Evapotranspiration?
A: Reference Crop Evapotranspiration is a hypothetical grass reference crop with an assumed crop height, used as a standard for comparison.

Q2: Why use a factor of 1.1 for rice crops?
A: The 1.1 factor accounts for the specific characteristics and water requirements of rice crops compared to the reference grass crop.

Q3: What are typical ET values for rice?
A: ET values vary based on climate, growth stage, and other factors, but typically range between 4-8 mm/day during peak growth periods.

Q4: How does ET affect irrigation scheduling?
A: ET values help determine the amount of water needed to replace what is lost through evaporation and transpiration, ensuring optimal crop growth.

Q5: Are there limitations to this calculation?
A: This calculation provides an estimate and may need adjustment based on specific local conditions, crop variety, and growth stage.