The Prairies Prairies are found on the humid side of the grassland biome and often referred to as the tall-grass prairie . A favorable annual moisture balance supports a dense ground cover of tall grasses. Trees and shrubs are generally limited to moist sites along stream channels or hillslopes facing away from the sun. The nutrient - rich beneath the grasslands drew farmers to the these regions. Now, most natural tall grass prairie has been replaced by agriculture.
Extensive grasslands occur through Argentina and the Ukraine.
Tall grass prairie once common to the eastern Great Plains. The native grasslands of the world supported a diversity of animal life. In North America, large grazers like the bison roamed the grasslands until hunted to near extinction by settlers moving west. On the drier side of the grassland biome lies the steppe grasslands . Vegetation must cope with the summer soil moisture deficit common to the Steppe Climate in which this formation class is found.