All of the Following Are Long-Term Challenges Associated with High-Yield

question 10

Multiple Choice

All of the following are long-term challenges associated with high-yield marginal farmlands in the U.S.except:

• A)loss of topsoil.
• B)high cost of fossil fuel.
• C)decreasing salinity of soil.
• D)silting of irrigation works.
• E)high cost of fresh water.

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