Biotechnology is science of manufacturing useful substances, chemicals. medicines by use of living organisms and their life process. In fact. biotechnology is not a new science. Alcohol was the first product manufactured by ancient biotechnologist. In recent years, biotechnology is growing as a separate science - after recognizing its importance in many fields. It has attracted the attention of m...

Crop production can be improved by breeding new varieties of crops having higher yield. The main aim of plant breeding is to produce new crops superior to the existing ones. By this method. new varieties of crops, having higher yield, resistant to pests and disease can be grown. Hence, plant breeding can be defined as a science as well as art of improviqg genetic make-up of plants in relation to t...

Mixed cropping is growing of two or more crops simultaneously on the same piece of land. It is also known as multiple cropping. This type of cropping leads to an improvement in the fertility of the soil and hence, increase in crop yield because when the two crops are properly chosen the products and refuse from one crop plant help in the growth of the other crop plant and vice-versa. Mixed croppin...

Besides crop production, good crop management involves storage of grains before distribution. During storage, grains and seeds are subjected to spoilage by various agencies. These agencies are either biotic or abiotic. Some examples are: - Biotic - insects, rodents, birds, fungi, mites, bacteria - Abiotic' - moisture and temperature The loss due to spoilage has been assessed to be to the tune o...

Insect - Pest Control If insect pests attack the plant by cutting and destroying the root an insecticide like chloropyrophos is mixed in the soil to control it. If insect pests attack the plant by cutting the stem and leaves and it is a boring type of insect, it can be controlled by dusting or spraying contact insecticides like malathion, lindane and thiodax. If the insect pests sllck the sap fro...