The two most important industries that were crippled by the storm were agriculture and oil — the former because New Orleans was the major port for American agricultural exports, and the latter because of the havoc Katrina wreaked on both Gulf oil rigs and Gulf Coast refineries.
The city's main economic bases were agriculture in the 17th century, shipping in the 18th century, and manufacturing in the late 19th century.
Among his publications were Agriculture in an Unstable Economy (1945), The Economic Value of Education (1963), Economic Growth and Agriculture (1968), Investment in Human Capital (1971), and Investing in People: The Economics of Population Quality (1981).
The industries first affected were agriculture, fine chemicals, food processing, and pharmaceutical production.
In the pre-modernity, societies were agriculture based and developing countries were far behind from the advancement of science and technology.
Major sectors highlighted in the survey were agriculture, services and manufacturing; the highest number of enterprises belongs to other categories (47.4 %) followed by services sector (42.7 %), manufacturing (7.1 %) and agriculture (2.8 %).
