Question

explain two common meathods of crop varity imporvement

Answer 1

First way is = Crop rotation
Second way is = Mixed cropping

CROP ROTATION = Crop rotation is the practice of growing different kinds of crops during different season to help maintain nutrient level in soil.

Advantage of crop rotation :
• improve the fertility of the soil ;
• increase the production of food grain ;
• acts as weed control or pest control.

MIXED CROPPING = Mixed cropping is a farming practice in which two or more kinds of plants are planted at the same kind In the same field .

Advantage of Mixed cropping :
• provide a balance of input and output of soil nutrients ;
• increase overall crop yield ;
• allow for the growth of more than one variety of crop in a season .

Answer 2

Answer:

• COMMON FACTORS FOR CROP IMPROVEMENT - DEFINITION

Crop variety improvement can be achieved by the process of selection. The criteria for selection are high yield, disease resistance, response to fertilisers, tolerance to climate, etc.

Crop production improvement is the protection of crops that are growing or have been harvested. Nutrient management, irrigation and cropping patterns can help improve crop production.

• FACTORS FOR WHICH CROP VARIETY IMPROVEMENT IS CARRIED OUT - DEFINITION

Crop variety improvement brings in following advantages.

a)Increase in the crop yield

b)Increase in the quality of the crop

c)Development of biotic and abiotic resistant crops.

d)Development of crops with shorter maturity duration.

e)Development of crops with wider adaptability.

f) Introduction of desirable characteristics in crops.

• CROP IMPROVEMENT (HYBRIDIZATION) - DEFINITION

Individual produced as a result of cross between two genetically different parents is known as hybrid. The natural or artificial process that results in the formation of hybrid is known as hybridization.

• DEFINITION OF HYBRIDIZATION - DEFINITION

Hybridization is a technique used for developing new varieties of crops by cross breeding two different varieties. By cross breeding, a new variety can be made to have the desired characteristics from both parents.