Problem: In a practice known as crop rotation, farmers alternate a crop of legumes (plants whose roots bear nodules containing Rhizobium) with a crop of nonlegumes. What is the benefit of this practice?  a. It keeps those bacteria that are plant pathogens from becoming pesticide resistant. b. Rhizobium fixes nitrogen, and the fixed nitrogen will fertilize the soil. c. It prevents the farmer from being exposed to the same crop pathogens year after year. d. It keeps the plants from becoming pesticide resistant. e. It keeps the plants from becoming tolerant of the bacteria in a particular variety of soil.

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Problem Details

In a practice known as crop rotation, farmers alternate a crop of legumes (plants whose roots bear nodules containing Rhizobium) with a crop of nonlegumes. What is the benefit of this practice? 

a. It keeps those bacteria that are plant pathogens from becoming pesticide resistant.

b. Rhizobium fixes nitrogen, and the fixed nitrogen will fertilize the soil.

c. It prevents the farmer from being exposed to the same crop pathogens year after year.

d. It keeps the plants from becoming pesticide resistant.

e. It keeps the plants from becoming tolerant of the bacteria in a particular variety of soil.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Nitrogen Fixation concept. You can view video lessons to learn Nitrogen Fixation. Or if you need more Nitrogen Fixation practice, you can also practice Nitrogen Fixation practice problems.

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Based on our data, we think this problem is relevant for Professor Jiang's class at GSU.