Which development in the early 1900s made the land in the Great Plains even more vulnerable to erosion?
Railroads stopped building lines across the West.
People settled the region in greater numbers, increasing the amount of land being plowed and grazed.
Large numbers of farmers left the region and moved to cities.
Farmers reduced the number of acres they plowed each year.
Railroads stopped building lines across the West.
People settled the region in greater numbers, increasing the amount of land being plowed and grazed.
Large numbers of farmers left the region and moved to cities.
Farmers reduced the number of acres they plowed each year.