grassland: major grasslands of the world. The three types of grasslands of the world are prairie, steppe, and savanna. Little of the original prairie still bears a mantle of tall grass.Instead, farmers raise a variety of crops on its rich soil.The moister portions of the steppe are cultivated, and the rest is valuable pasture.rassland: major grasslands of the world. The three types of grasslands of the world are prairie, steppe, and savanna. Little of the original prairie still bears a mantle of tall grass.