What do you mean by crop variety improvement?

Crop variety improvement:

1. Crop variety improvement is the primary step to improve food crop production.
2. It helps in the development of crops with desired traits such as high yields, disease resistance, quality product, and response to fertilizers.
3. We can raise different strains of food crops with desirable traits naturally as well as scientifically.
4. Two of the scientific methods are as follows: Hybridization and Gene incorporation.