Gce Model Questions Vol1 2021 Agricultural Science Question 24

Practice objective / multiple choice question 24 from the 2021 Gce Model Questions Vol1 Agricultural Science examination.

Gce Model Questions Vol1 2021 Agricultural Science Objective / Multiple Choice Hard Difficulty
Question 24 GCE_MODEL_QUESTIONS_VOL1 • 2021 • AGRICULTURAL_SCIENCE • objective

A forest stand covers 50 ha and has an average tree density of 200 trees ha⁻¹. The mean diameter at breast height (DBH) is 30 cm and the average height is 20 m. Tree volume (in m³) can be approximated by \( V = 0.05 \times DBH^{2} \times H \), where DBH is in metres. (a) Calculate the total standing volume of the stand. (b) If the annual volume increment is 2 % of the standing volume, determine the sustainable annual harvest volume that would keep the stand volume constant. (c) Assuming 0.5 t of carbon is stored per cubic metre of wood, estimate the total carbon stock of the stand.

Answer Options

A. Total volume = 850 m³; sustainable annual harvest = 17 m³; carbon stock = 425 t C.
Correct Answer B. Total volume = 900 m³; sustainable annual harvest = 18 m³; carbon stock = 450 t C.
C. Total volume = 1 000 m³; sustainable annual harvest = 20 m³; carbon stock = 500 t C.
D. Total volume = 950 m³; sustainable annual harvest = 19 m³; carbon stock = 475 t C.
Correct Answer
B
Correct Option:
Total volume = 900 m³; sustainable annual harvest = 18 m³; carbon stock = 450 t C.

About This Question

This is Gce Model Questions Vol1 2021 Agricultural Science Question 24. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Agricultural Science examination.

Difficulty level: Hard .

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