21.3.1. Introduction

Try these first

1. 1.

   What does the Blaney and Criddle method estimate?

   Hint

   Think about water usage in agriculture.

2. 2.

   List two factors that the Blaney and Criddle method uses.

   Hint

   What kind of climatic data do you think is readily available?

3. 3.

   What primarily does the Blaney and Criddle method estimate?

   • Soil moisture
   • Crop evapotranspiration
   • Plant growth

   Hint

   Think about its application in agriculture.

4. 4.

   True or False: The Blaney and Criddle method considers humidity for its calculations.

   • True
   • False

   Hint

   Recall the limitations discussed in class.

5. 5.

   Explain how you would adjust your irrigation strategy using the Blaney and Criddle approach in a year with unexpected low rainfall.

   Hint

   Consider each aspect of ET and how decreased rainfall modifies growth.

6. 6.

   Design a plan for using the Blaney and Criddle method to estimate water needs for a new crop type introduced in your area.

   Hint

   Identify how the new crop might differ from others to adjust the crop coefficient appropriately.