In Nebraska, which primary crop is used for making brooms?

Proso millet is the primary crop used in Nebraska for making brooms due to its characteristics that are suitable for broom production. The plant produces long, sturdy seed heads which can be harvested and processed into broom corn, a traditional material for broom making. Proso millet's growth conditions in Nebraska provide the right climate and soil type for its cultivation, contributing to its prominence in broom manufacturing. Other crop options, like hay, wheat, and cotton, do not possess the specific physical traits or processing capabilities needed for broom production, making proso millet the clear choice in this context.