Food is an essential substance consumed by living organisms to obtain the essential nutrients required for the growth and maintenance of life. Such nutrients are digested and assimilated in body to provide energy and to carry out the important life sustaining functions.
The nutrients contained in food are of two types: micronutrients and macronutrients.
This approach is based on selecting the crop that can provide us good yield with desirable features or incorporating the desirable features into the growing crops. Technique is followed with different aim and through different ways.