44.4.1. Definition

Try these first

1. 1.

   What does the frequency of irrigation mean?

   Hint

   Think about how frequently you would water a plant.

2. 2.

   List one factor that affects irrigation frequency.

   Hint

   Different crops have different water needs.

3. 3.

   What is the frequency of irrigation?

   • Interval between two irrigations
   • Type of soil
   • Amount of water needed

   Hint

   Focus on what the term frequency relates to in terms of irrigation.

4. 4.

   True or False: Soil texture affects how often irrigation should be applied.

   • True
   • False

   Hint

   Consider how sandy versus clayey soil will absorb and retain water.

5. 5.

   A farmer has a root zone depth of 70mm, with a management allowable depletion of 30%. If the evapotranspiration is 4mm/day, calculate the frequency of irrigation.

   Hint

   Convert the percentage to a decimal first.

6. 6.

   How might a temperature increase during summer months affect a farmer's irrigation plan for shallow-rooted crops?

   Hint

   Think about the relationship between temperature and crop water needs.