USA HISTORY

Detailed explanation-1: -Agricultural activities range in the northern Plains from crop production, dominated by alfalfa, barley, corn, hay, soybeans, and wheat to livestock production centered on beef cattle along with some dairy cows, hogs, and sheep.

Detailed explanation-2: -The major harvested crops in the Great Plains are wheat, hay, corn, and cotton. Wheat is the dominant harvested crop (50% of the harvested land), followed by hay (20%), corn (15%), and cotton (4%).

Detailed explanation-3: -More than 60 animal species are directly useful to humans, but most attention tends to be given to cattle, buffaloes, sheep, goats, pigs, horses, donkeys and poultry. There are also more unconventional animals such as llamas, yaks, guinea fowl, ducks, bees and pigeons that can adapt to many conditions.

Detailed explanation-4: -The expansion of railroads and the invention of barbed wire and improvements in windmills and pumps attracted ranchers and farmers to the Great Plains in the 1860s and 1870s.