Gce Model Questions Vol1 2021 Geography Question 49
Practice objective / multiple choice question 49 from the 2021 Gce Model Questions Vol1 Geography examination.
A farmer's field has a loamy soil with bulk density 1.3 g cm⁻³. The soil's field capacity is 0.30 m³ m⁻³ and its wilting point is 0.15 m³ m⁻³. The root‑zone depth is 0.60 m. The crop must be kept at a minimum of 70 % of the available water capacity (AWC) throughout the growing season. At planting the soil is at field capacity. (a) Calculate the maximum amount of water (in mm) that can be withdrawn from the soil before irrigation is required. (b) Determine the depth of irrigation (in mm) needed to restore the soil to field capacity after this depletion.
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About This Question
This is Gce Model Questions Vol1 2021 Geography Question 49. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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