The people were doing their cultivation on the land and they use to feed the water and nutrients to the plants for the growth. Now the demand for fruits, vegetables and other type of foods has got increased and the human has searched to find the better way for cultivating the crop plants, in a better manner and to increase the productivity to match with the demand.
The research and development has detected many ways for the cultivation, which also were not successful due to the affect of pests and other diseases influenced on the plants.The people have taken the help of chemicals to get rid of pests and other diseases to help the plants to grow.