Clearly something else has to be done in order to avoid an eventualecological disaster. Conservationists insist that the solution to the problem lies innew and better farming techniques. 50.（ Concerned farmers are building terraceson hilly fields, rotating their crops, and using new plowing methods to cut soillosses significantly. Substantial progress has been made, but soil erosion is farfrom being under control.） The problems and innovations of the agricultural industry in the Midwestare not restricted to growing crops. Livestock raising, which is a big business inthe central region of the United States, is also undergoing many changes.
有生态意识的农民们在山地上修造梯田，实行作物的轮作，并且采用新的耕作方法来大幅度地减少土壤流失。虽然已经取得了很大的进展，但是土壤侵蚀还远远没有得到控制。
