The New International Encyclopædia…
“ The deep alluvial deposits of the Red River Valley are of inexhaustible fertility, and are conspicuously favorable to wheat-growing. The glacial drift of the prairies forms, in addition, an excellent subsoil, but toward the west it grows poorer and more scanty, especially in the southwest. Forest growth is found only along the river banks, and on the Turtle Mountains in the north, and in some sections of the Red River Valley. The remainder of the State is a treeless prairie covered with numerous species of grasses and other forage plants. ”
