How did human error cause the dust bowl?
fast

government policies kept farmers from making decisions on what to plant and how.

crop rotation led to thin topsoil and poor nutrients.

there was little rainfall for several years.

high prices for wheat encouraged farmers to plow under thousands of acres of grasslands.

There was little rainfall for several years.

Option 3

Explanation:

During the time of 1930s, there was severe drought in the United States of America because of the lack of rainfall for many years. Because of this there was wind erosion. Moreover the farmers of that area did not apply the dry land farming also.

The time period of dust storm led to huge disaster and destruction in the ecology and to the environment of the American and Canadian prairies. This added more to the great depression and strengthened it even more because the production of food was also badly affected. Thus time period was known as the dirty 30s.

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pepin the short[a] (german: pippin der kurze, french: pépin le bref, c. 714 – 24 september 768) was the king of the franks from 751 until his death. he was the first of the carolingians to become king.[b][2]

the younger son of the frankish prince charles martel and his wife rotrude, pepin's upbringing was distinguished by the ecclesiastical education he had received from the monks of st. denis. succeeding his father as the mayor of the palace in 741, pepin reigned over francia jointly with his elder brother carloman. pepin ruled in neustria, burgundy, and provence, while his brother carloman established himself in austrasia, alemannia and thuringia. the brothers were active in suppressing revolts led by the bavarians, aquitanians, saxons, and the alemanni in the early years of their reign. in 743, they ended the frankish interregnum by choosing childeric iii, who was to be the last merovingian monarch, as figurehead king of the franks.