Which of the following was not a harmful farming practice that contributed to the severe damage of Great Plains farmland during the Dust Bowl era?

Removing native grasses for wheat, avoiding crop rotation, and failing to create wind barriers all left Great Plains soil exposed to wind erosion. Not using fertilizer is not typically identified as one of the harmful farming practices that caused the Dust Bowl damage. Therefore, the choice stating that farmers failed to use fertilizers is the one that was not a harmful practice.

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