Gce Model Questions Vol1 2025 Geography Question 22
Practice objective / multiple choice question 22 from the 2025 Gce Model Questions Vol1 Geography examination.
An evergreen forest has a leaf‑area index (LAI) of 6. The incident photosynthetically active radiation (PAR) is 45 MJ m⁻² day⁻¹. The fraction of PAR intercepted by the canopy is given by \(f = 1 - e^{-k \times LAI}\) where the extinction coefficient \(k = 0.5\). The photosynthetic efficiency of the intercepted PAR is 2.5 %, and each megajoule of PAR corresponds to 0.48 mol of photons. At the given efficiency, each mole of photons fixes 0.12 g of carbon. Calculate the daily gross primary production (GPP) in g C m⁻² day⁻¹.
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This is Gce Model Questions Vol1 2025 Geography Question 22. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Geography examination.
Difficulty level: Medium .
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