Question

Crop improvement variety is a must.
justify giving three examples

Answer 1

Crop variety improvement is important because of following reasons.
1. It helps to increase the yield of crop production
2. It helps to produce disease  resistant crops
3. It helps to increase the nutrient quality of the crops

Answer 2

Crop improvement refers to the genetic alteration of plants to satisfy human needs. In prehistory, human forebears in various parts of the world brought into cultivation a few hundred species from the hundreds of thousands available. In the process they transformed elements of these species into crops though genetic alterations that involved conscious and unconscious selection, the differential reproduction of variants. Through a long history of trial and error, a relatively few plant species have become the mainstay of agriculture and thus the world's food supply. This process of domestication involved the identification of certain useful wild species combined with a process of selection that brought about changes in appearance, quality, and productivity.