crops need protection so that it grows healthy. it needs protection from pests that can destroy it. farmer also need to protect crops from diseases. there are plants that grow unnecessarily with the required crops and creates a competition for the desired plants. they need to be removed from the farms.
Crops need protection so that they can grow when they are healthy. Another reason for protection is to prevent them from being attacked by various plant diseases. You need to contact a botanist so that he or she can advice you more.