'The term “robber baron” was applied to powerful nineteenth-century industrialists who were viewed as having used questionable practices to amass their wealth. On the other hand, “captains of industry” were business leaders whose means of amassing a personal fortune contributed positively to the country in some way.'
It turns the top soil and any remains crop over, producing fertilizer. It breaks up the soil for easier planting. By turning over the soil, weeds are reduced. Hope this helped!