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I'm unaware of any US farmers applying rock salt to a field. However, you may have seen the application of lime, a white- or gray-colored material rich in calcium and other micronutrients to the field. Plants need calcium as a secondary nutrient.

The main reason for lime application, though, is simply to raise the pH (measure of acidity / alkalinity) of the field. Most crops prefer to grow in relatively neutral pH soils, but many soils in the eastern half of the US tend to be rather acid. Lime will economically counteract the acidity of the soil, making a more "crop-friendly" soil.

Answer:

It is unlikely that any farmer would sow his fields with salt as this kills all vegetation and destroys the soil structure. As an act of vandalism he might salt his enemy's field. Salting the earth, or sowing with salt originated as a practice in the ancient Near East and became a well-established folkloric motif in the Middle Ages. It means sterilizing the soil so no crops can ever be grown there again.

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15y ago

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