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.
1 1840: Treaty between Britain and Venezuela to abolish slave trade; the first World Anti-Slavery Convention meets in London. 2  1841: Quintuple Treaty is signed; Britain, France, Russia, Prussia, and Austria agree to suppress slave trade. 1873: Slavery abolished in the Spanish colony of Puerto Rico: March 22. 2  1873: Treaty between Britain and Zanzibar and Madagascar to suppress slave trade. 3  1874: Britain abolishes slavery in the Gold Coast (now Ghana), following its annexation in 1874. 4  1877: Slavery had been abolished in Egypt in August 1877.