Test Index

WAEC Agriculture 2017 Paper

Question : 21

Total: 50

Solution:

Concept:

Plant population per hectare is calculated by dividing the area of one hectare by the area occupied by one plant.

Explanation:

Area of one hectare =

10{,}000 \, \mathrm{m^2}

Let the spacing between stands be

x \, \mathrm{m}

Area occupied per plant = row spacing

\times

plant spacing =

1.0 \times x \, \mathrm{m^2}

Given plant population =

40{,}000

plants per hectare.

So,

\frac{10{,}000}{1.0 \times x} = 40{,}000

Solving for

x

x = \frac{10{,}000}{40{,}000 \times 1.0} = 0.25 \, \mathrm{m}

Answer:

0.25 \, \mathrm{m}

(Option A).

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