Gce Model Questions Vol1 2021 Agricultural Science Question 10
Practice objective / multiple choice question 10 from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
A mixed‑species plantation contains species A (QMD = 30 cm, 800 trees ha⁻¹) and species B (QMD = 20 cm, 1200 trees ha⁻¹). Basal area per hectare for a species is \(\text{BA}=\dfrac{\pi}{4}\,\text{QMD}^{2}\,N\), where \(N\) is the number of trees per hectare. The manager wishes to raise total basal area by 15 % while keeping the total number of trees at 2000 ha⁻¹ by altering the proportion of species A and B (QMD values remain unchanged). What percentage of the total trees should be species A to achieve the target basal area?
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About This Question
This is Gce Model Questions Vol1 2021 Agricultural Science Question 10. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Agricultural Science examination.
Difficulty level: Hard .
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