Capillary water exists in the porous space of the soil by molecular attraction. This is the useful moisture for the growth of plants. Hydroscopic water and gravitational water cannot be absorbed by the root zone.
What is total depth of water, for complete growth of crop called?
A.
Triangle
B.
Delta
C.
Duty of water
D.
Rotation period
Answer: Option B
Explanation:
The total quantity of water required by the crop for its complete growth can be expressed in terms of depth of water standing on the field. This total depth expressed in cm is called delta.
Which type of period is slightly more than its counterpart period?
A.
Crop Period
B.
Period
C.
Base period
D.
Rotation period
Answer: Option A
Explanation:
Crop period is time period between the instant of sowing to its harvesting. Base period is the time period between the first watering of crop to its final watering before harvesting.