The tall grass prairie are tall grasses with long deep reahing roots.Only 0.1% of the original prairie has left in Iowa state so there conservation is really important.As they have long deep roots about 12 feet deep so they can hold the soil well and they have resulted in formation of fertile soil by this process.Also they hold soil and prevent erosion.They also act as food as they are grazed by bison and elk.Some of it are also resistant to and have thrived to survive in Iowa state climatic condition and soil types so they can act as refuge.So there genetic material storage and the prairie plants need to be conserved.
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