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Only 10% of the Earth's surface is used for crop production, and 26% is used as grazing land. Many areas on the Earth are unsuitable for crop production based on mainly topography, precipitation and soil type and quality, and are instead better utilized and managed with the use of grazing animals. However, such marginal land isn't the only land that is best for grazing, much of the land that is deemed suitable for crop production, such as that of the Midwest USA that used to be native prairie grasslands only 100 years ago, is still in fact best for grazing, primarily because of water.

Prairies are known for their extreme climate (hot, dry summers and cold, snowy winters, for example) and periods devoid of acceptable precipitation for growing corn and soybeans, thus irrigation needs to be utilized to grow such crops. Since water is becoming an increasingly worrying issue, it would only make sense to convert cropland back to native prairie and thus significantly reduce the use of irrigation, or at least the amount of land used for irrigation.

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9y ago
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Q: How does the amount of grazing land compare with the amount of farmland?
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