WAEC Agriculture 2022 Paper

Concept:Plant population is the number of plants that can occupy one hectare when each plant is given a fixed rectangular spacing.Explanation:First, convert the spacing from centimetres to metres because one hectare is expressed in square metres.$60\text{ cm} = 0.60\text{ m}$$90\text{ cm} = 0.90\text{ m}$Calculate the ground area occupied by one maize plant.$\text{Area per plant} = 0.60 \times 0.90 = 0.54\text{ m}^2$One hectare is equal to $10{,}000\text{ m}^2$.Therefore, divide the total area by the area per plant.$\text{Plant population} = \frac{10{,}000}{0.54} = 18{,}518.5$Rounding to the nearest whole plant gives $18{,}519$ plants per hectare.Answer:A. 18,519 plants