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Bill lives in Montana and likes to grow zucchini. He applies fertilizer to his crop twice during the growing season and notices that the second layer of fertilizer increases his crop, but not as much as the first layer. What economic concept best explains this observation?
Correct Answer: B
The law of diminishing returns implies that as increasing amounts of the variable input is used, the additional output associated with one more unit of input decreases. Thus, the marginal return associated with one more unit of input declines. Thus, if output increases at a decreasing rate this implies that although output increases as another unit of input is applied, it is increasing by less and less. Thus, more and more inputs are required in order to increase output by one unit.