Contribution To The Study Of The Belgian Agricultural Production 1846-1913: As early as 1830 agriculture was by far the main activity of the country and its relative perfection made it an example for most of the other european states. In 1846 its production was more than 7/10 of the whole physical output, although the crisis of the linen industry and the potato disease had already endangered the prosperity of the land. Industrial growth overturned technology as well as the markets.