Corn is threshed by a norag, a machine resembling a chair, which moves on small iron wheels or thin circular plates fixed to axle-trees, and is drawn in a circle by oxen.
The rice is threshed by being beaten in bundles on stones set upright on the threshing-floor; and when beaten out the grain is stored by the Hova in rice-pits dug in the hard red soil, but by the coast tribes in small timber houses raised on posts.
Formerly wheat was grown chiefly in the region of long rainless summers, and the ripened grain was thrown upon uncovered earth floors and threshed by horses driven about over the straw, but this antiquated process was not suited to the climate and enterprise of the more southern provinces, and the modern threshing-machine has been introduced.
Rice is threshed by beating the ears on a log; other grains, with flails on mud threshing-floors.
In the principal rice-producing districts the rice is threshed and cleaned by machines, but in other districts more primitive methods are employed.