during the roaring twenties, american farmers; which led to the dust storms of the 1930s?; people looking for farm work during the great depression often moved to; during the 1930 the large area of farmland; migrants who left the great plains behind during the 1930s; which directly contributed to soil erosion on the great plains in the 1930s?; during the 1930s, the large area of farmland experiencing droughts was known as; which most damaged topsoil and farming equipment during the 1930s?