Discussion
The term used in crop water requirement in which the crop yield found severely affected due to inadequate moisture is-
Answer: B
The term is Critical period.
The critical period (critical stage) of a crop for water is the growth stage at which a shortage of soil moisture reduces yield most severely and cannot be made up by later irrigation, such as crown root initiation in wheat or flowering in many crops. Irrigation is scheduled first at these stages when water is limited.
Evapotranspiration is the total water lost by the crop and soil. Delta is the total depth of water a crop needs over its base period, and duty is the area a unit flow of water can irrigate. None names the sensitive stage.
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