7.Refer to the tables below for resource information. Determine the current wate

Question

7.Refer to the tables below for resource information. Determine the current water balance (inches) for corn at silking stage, grown in fine sandy loam soil if the soil water sensing equipment indicates 60% of the available water in the active root zone is available.  

a. What is the rooting depth for corn at silking stage?    


b. How many inches of available water per foot does fine sandy loam soil hold?    


c. Determine the amount of available water (inches) that could potentially be held in the active root zone for this scenario.    

d. How many inches of available water is in the active root zone for this scenario?    

e. How long (day) would it take for the corn plant to use all the available water in this scenario?

Explanation / Answer

a. From table 1 root depth with various plants growth stages, the rooting depth for corn at silking stage is 3 feets.

b. From table 2 i.e availabe water for different soil textural classes the availabe per foot held by fine sandy loam soil is 1.8 inches per feets.

c. The available water is in the active root zone for this scenario is 60% of 3 feet whereas 1 feet contains 1.8 inches.

1 feet =1.8 inches

3 feet =3*1.8 inches

=5.4 inches

Since the soil water sensing equipment indicates 60% of the available water in the active root zone is available, therefore available water is in the active root zone for this scenario is:

(60/100)*5.4 inches

3.4 inches

d. Inches of available water is in the active root zone for this scenario:

Fine sandy loam soil is 1.8 inches per feets.

Rooting depth for corn at silking stage is 3 feets.

Inches of available water is in the active root zone for this scenario  =3*1.8 inches

=5.4 inches

e. The water balance for corn is 50% as given in table number 3.

The corn plant has taken 3.4 inches out of 5.4 inches avilabe at 3 feets of rooting depth.

water taken by plant = 3.4 inches

water available at 3 feets of rooting depth = 5.4 inches

remaining water = 5.4 inches- 3.4 inches

= 2 inches

water balance for corn is 50%

water taken in one day = 1.8*(50/100)

=0.9 inches

for 2 inches time taken (days) = 2/0.9

=2.22 days

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