The east and north parts lie in the basin of the river Fulda, which near the north-eastern boundary joins with the Werra to form the Weser.
The Werra and Fulda are both navigable when they unite to form the Weser, the Fulda being canalized between Cassel and the town of Fulda for a distance of 17 m.; the Aller, Wiimme, Geeste and Hunte are also navigable.
Visurgis), one of the chief rivers of Germany, formed by the union of the Werra and the Fulda at Minden, in the Prussian province of Hanover, flowing generally north and entering the North Sea below Bremerhaven, between Jade Bay and the estuary of the Elbe.
Tobacco, in the Werra district, hops and flax are also raised.
The Werra valley and the other fertile valleys produce large quantities of fruit.