Analyse how us government policy towards the plains indians developed in the period 1835-1851.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

answer; people where able to travel across the u.s.a faster than any other mode of transportation,travel time was about a week,from coast to coast