Agriculture is still the #1 industry in North Dakota's economy. The state typically leads the nation in over a dozen crops. Production agriculture is an important part of the North Dakota economy. 1  North Dakota continues to work to diversify its agricultural fabric by targeting the development of value added agriculture. Definition of Value Added Agriculture.
Brazil was the last American nation to abolish slavery, on 13 May, 1888. At the time Rio represented the largest urban concentration of slaves since the end of the Roman empire, more than 40% of the population, almost a complete city in irons.
However, what I could find as the first country to abolish slavery is: In 221-206 BC: The Qin Dynasty's measures to eliminate the landowning aristocracy include the abolition of slavery and the establishment of a free peasantry who owed taxes and labor to the state. They also abolished primogeniture and discouraged serfdom.