The country entered capitalist economic development much later than other European countries. Despite the presence of some foreign (mainly Italian) investment, Albania had made little move towards industrial development at the onset of World War II. Agriculture, which employed over 87% of the workforce, was the main sector of the economy and contributed 92.4% of the national income, with main outputs being wheat, maize and rye. Agriculture used primitive tools such as wood ploughs, whilst fertilisers were hardly known at all, and drainage poor. The level of productivity and level of organization and mechanization of agriculture in this period were very low.