Q1.    Why should preventive measures and biological control methods be preferred for protecting crops?

Answers (1)
H Harsh Kankaria

Preventive measures and biological control methods are used as they are simple, not expensive, environmentally safe and do not affect the soil quality.

These methods are also harmless to other forms of life. The main purpose is to protect the crop from disease-causing pathogens and weeds. 

Some preventive measures are proper seedbed preparation, timely sowing of crops, intercropping and crop rotation.