These biomes are found toward the middle latitudes. What deserts and grasslands have in common is that they do not get enough precipitation to support trees.some deserts are cold and some deserts are hot, but all deserts are characterized by their dry soil. Less than 25 centimeters of rain falls each year in a desert. Grassland ecosystems develop in areas of moderate rainfall, generally from 50 to 90 centimeters each year. There is enough rain to support grasses, but too little rain to support forests
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