21.3.2. Blaney and Criddle Equation

Try these first

1. 1.

   What does the acronym ET stand for?

   Hint

   Think about what water loss from soil and plants is called.

2. 2.

   What does the crop coefficient (k) indicate?

   Hint

   It's related to the type and growth stage of a crop.

3. 3.

   What is the formula for the Blaney and Criddle Equation?

   Hint

   Recall the components and how they relate to ET.

4. 4.

   True or False: The Blaney and Criddle Method considers humidity levels.

   • True
   • False

   Hint

   Think about what influences evapotranspiration aside from temperature.

5. 5.

   A farmer has a crop coefficient (k) of 1.0, a mean monthly temperature (T) of 30°C, and a p factor equal to 0.6. Calculate the monthly evapotranspiration.

   Hint

   Follow the Blaney and Criddle formula step by step.

6. 6.

   Explain the implications of using the Blaney and Criddle method for planning irrigation in a highly variable climate.

   Hint

   Consider the consequences of inaccurate estimates in agriculture.