what is the importnce of using different varieties or grow different crop species with resistance to many diseases?

Use of different crop species with disease resistance for the most part is considered as a significant and fruitful component in preventing and controlling pests and diseases that is moderately reasonable or less expensive, naturally protected and advantageous for the farmer. Other methods of protection are moderately disadvantageous to the farmer as they require huge money in machinery and special training.

Explanation:

Co-development of plants and pathogens is an overall phenomenon. Thus, all agricultural harvests are harmed on the off chance when they are not protected against these pathogens. Much of the time this harm is sensational. Crop protection along these lines is important not just for the upkeep of crop maintenance and soundness, yet additionally much of the time to forestall negative consequences for the quality of the crop.

“a committee reviews the bill and marks it up to make it more viable and to reflect interests 

d. hip hop

it was originated in the 70s while the harlem renaissance occured in the 1920s