Following a severe regional drought, a state government offered generous subsidies to farmers who switched to planting a newly developed, drought-resistant variety of wheat. This new variety requires exactly half as much irrigation water per acre as traditional wheat. Within a year, over of the region's farmers had switched to the new variety. Yet, surprisingly, the total amount of irrigation water used for agricultural purposes in the region increased significantly during that year.
Which of the following, if true, most helps to resolve the apparent discrepancy?
- The lower operating costs resulting from the new wheat variety enabled farmers to profitably irrigate and cultivate thousands of acres of marginal land that had previously been left fallow.Cevap
- BAlthough of the farmers switched to the new variety, the remaining who continued using traditional crops operated some of the largest farms in the region.
- CFollowing the end of the drought, several large metropolitan areas in the state significantly increased their municipal water consumption.
- DThe new drought-resistant wheat variety matures much faster than traditional wheat, allowing it to be harvested before the hottest and driest months of the summer begin.
- EThe agricultural subsidies provided by the government were distributed based on the total number of acres a farmer owned, rather than the amount of wheat actually harvested.
Cevap
The statement explaining that lower operating costs allowed farmers to cultivate thousands of acres of previously fallow land.
The correct answer resolves the paradox by demonstrating that while the rate of water use per acre decreased, the absolute number of acres being irrigated increased massively. Because the crops became much cheaper to grow, farmers used their savings to plant on thousands of additional, previously unfarmed acres. The sheer volume of new land being watered offset the per-acre water savings, leading to a net increase in total agricultural water consumption.
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Anahtar Kavram
Explaining Surprising Outcomes by distinguishing between a rate (water per acre) and an absolute quantity (total water used).