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The Ogallala aquifer, or the High Plains aquifer, is an integral fresh water source for the entirety of the Great Plains region, providing drinking water to 80% of the population and irrigating 13 million acres of land. Precipitation, seasonal lakes, and prehistoric water reserves serve as sources of water for the aquifer, which lies beneath ...
The flora of the alpine tundra is characterized by plants that grow close to the ground, including perennial grasses, sedges, forbs, cushion plants, mosses, and lichens. [28] The flora is adapted to the harsh conditions of the alpine environment, which include low temperatures, dryness, ultraviolet radiation, and a short growing season.
The land formation of the 490,590 square kilometres (189,420 sq mi) area of the Mixed Wood plains is predominantly plains, with some hills, and the bodies of water are many small lakes. The surface materials of the region are moraines and lacustrine and the soil composition includes forest soils and fine textured soils.
The excellent water economy within the evergreen species is due to high abundance when compared to deciduous species, [8] whereas deciduous trees lose nutrients whenever they lose their leaves. In warmer areas, species such as some pines and cypresses grow on poor soils and disturbed ground.
Although a forest is usually defined by the presence of trees, under many definitions an area completely lacking trees may still be considered a forest if it grew trees in the past, will grow trees in the future, [20] or was legally designated as a forest regardless of vegetation type. [21] [22]
Oklahoma — the Wichita Mountains, and the Great Salt Plains Lake in Salt Plains National Wildlife Refuge; Nebraska — the Platte River State Park near Louisville, Nebraska, and the Rainwater Basins to the south; Kansas — the Cheyenne Bottoms, the Quivira National Wildlife Refuge near the town of Stafford, the Red Hills, and the Smoky Hills ...
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