The consumptive use of water for a crop during a particular stage of growth is 3.0 mm/day. The maximum depth of available water in the root zone is 80 mm. Irrigation is required when the amount of available water is 55% of the maximum available water in the root zone. The frequency of irrigation should be?

8 days

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12 days

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24 days

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13 days

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Solution

The correct option is B 12 days
Consumptive use of water = 3.0 mm/day

Maximum depth of available water = 80 mm

If amount of available water is reduced by 45%,
then irrigation is required for a depth = 0.45 × 80 = 36 mm

$∴$
$Frequency of Irrigation = \frac{36}{3} = 12 d a y s$

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The correct option is B 12 days Consumptive use of water = 3.0 mm/day Maximum depth of available water = 80 mm If amount of available water is reduced by 45%, then irrigation is required for a depth = 0.45 × 80 = 36 mm ∴ Frequency of Irrigation=363=12days

The correct option is B 12 days
Consumptive use of water = 3.0 mm/day

Maximum depth of available water = 80 mm

If amount of available water is reduced by 45%,
then irrigation is required for a depth = 0.45 × 80 = 36 mm

$∴$
$Frequency of Irrigation = \frac{36}{3} = 12 d a y s$