If the rate of application per hectare is 0.75 kg a.i.

Solution

Rate of application per hectare: 0.75 kg a.i. per hectare Concentration of herbicide: WP 75% (which means 75% of the product is the active ingredient) To find the required quantity, we divide the desired rate of application (0.75 kg a.i. per hectare) by the percentage of the active ingredient in the product (75% or 0.75). Required quantity = Rate of application per hectare / Concentration of herbicide Required quantity = 0.75 kg a.i. per hectare / 0.75 Required quantity = 1.0 kg/ha Therefore, the required quantity is (b) 1.0 kg/ha.