An agricultural economist wants to test if a new farming technique increases crop yield on a specific plot of land. The study compares the yield from last year (using the old technique) with the yield from this year (using the new technique). To ensure that any change in yield can be correctly attributed to the new technique, which of the following factors would be the LEAST critical to assume has remained constant between the two years?
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An agricultural economist wants to test if a new farming technique increases crop yield on a specific plot of land. The study compares the yield from last year (using the old technique) with the yield from this year (using the new technique). To ensure that any change in yield can be correctly attributed to the new technique, which of the following factors would be the LEAST critical to assume has remained constant between the two years?
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