Question

Arrange in descending order of different climatic conditions in which maximum rates of soil moisture are used by crops. A. Cool, Humid; B. Cool, Dry; C. Moderate, Humid; D. Moderate, Dry; E. Hot, Dry.

• A. A \(>\) B \(>\) C \(>\) E \(>\) D
• B. E \(>\) D \(>\) C \(>\) B \(>\) A
• C. B \(>\) C \(>\) E \(>\) D \(>\) A
• D. B \(>\) C \(>\) D \(>\) A \(>\) E

Hint:

Soil moisture use is highest in hot dry climates and lowest in cool humid climates.

Answer 1

The Correct Option is B

Concept:
Soil moisture use by crops depends on temperature, humidity and evaporative demand.

Step 1: Highest soil moisture use.
Hot and dry climate has the highest evaporative demand. Therefore, crops use maximum soil moisture under: \[ E=\text{Hot, Dry} \]

Step 2: Next condition.
Moderate and dry climate has lower demand than hot dry but higher than humid conditions. \[ D=\text{Moderate, Dry} \]

Step 3: Humid and cool conditions.
Moderate humid has more moisture use than cool dry and cool humid. Cool humid has the lowest soil moisture use. \[ C=\text{Moderate, Humid} \] \[ B=\text{Cool, Dry} \] \[ A=\text{Cool, Humid} \]

Step 4: Final descending order. \[ E>D>C>B>A \] \[ \therefore \text{Correct Answer is (B)} \]