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Mollisol is a soil type which has deep, high organic matter, nutrient-enriched surface soil (), typically between 60 and 80 cm (24-31 in) in depth.This fertile surface horizon, called a mollic epipedon, is the defining diagnostic feature of Mollisols.
The soils, mostly Vertisols and Mollisols, are deep, loamy and clayey, and tend to be finer-textured than in the Lower Rio Grande Valley (34e) to the north. Some Entisols and Inceptisols occur near the river. The floodplain ridges once had abundant palm trees, and early Spanish explorers called the river "Rio de las Palmas." Most large palm ...
Low relief landscapes, such as the various types of grasslands found throughout the Great Plains, have an effect on rainfall distribution. Rainfall in this ecoregion increases from west to east resulting in various types of prairie grasslands. Topography in the Great Plains actually affects soil composition in areas of different elevation.
In Iowa, forest soils and alfisols formed on the paha, while prairie soils and mollisols formed on the surrounding landscape. [11] Most paha are still covered with trees or grazed while the surrounding landscape is in European-style agriculture.
Indiangrass thrives in deep, moist, prairie soils, woodland edges and bottomland habitats. In addition to its value as livestock and wildlife forage, Native Americans utilized Indiangrass as ...
The prairie is a narrow strip across the state from the Mississippi River to the border of Alabama. It is only 40 miles (64 km) across at its widest, [3] and generally 10–30 miles (16–48 km) wide. It runs in a diagonal line from near Jackson in the northwest, through Bienville National Forest and southeast to the Alabama border. [4]
The Snake River Plain ecoregion is a Level III ecoregion designated by the United States Environmental Protection Agency (EPA) in the U.S. states of Idaho and Oregon.It follows the Snake River across Idaho, stretching roughly 400 miles (640 km) from the Wyoming border to Eastern Oregon in the xeric intermontane west.
Soils are mostly poorly or very poorly drained, clayey Entisols and Vertisols. Swamp forest communities are dominated by bald cypress and water tupelo, which are generally intolerant of brackish water except for short periods. In areas where freshwater flooding is more prolonged, the vegetative community is dominated by grasses, sedges, and rushes.