WAEC - Biology (1989 - No. 36)
Which of the following statements is not correct about the ecological effects of agricultural activities?
The use of herbicides and pesticides in farms can cause pollution
Bush-burning encourages desertification
Excessive use of fertilizers in farms may have harmful effects
Tillage of tropical soils with ploughs and harrows may encourage erosion
Monocropping is one of the cultural methods of controlling pests.