... soils, but due to developing agriculture large soil erosions occurred affecting the fertility of soils. The frost-free season in prairie averages 100 - 300 days a year. Climate of the eastern part of tall grass zone is gentle, summers are humid and cool, and winters are relatively warm, that is favorable for smooth development of the plants. In the middle and west parts climate is dry and tough, winters are very cold and summers are backing-hot. Besides, drastic changes of daily temperature in this territory of grasslands causes droughts, winds, hails, hurricanes and other natural cataclysms. In spring, when the grasses are green and the forbs are in bloom, and midsummer, when brown, seeding, and dying plants predominate. Prairies are famous for their beautiful flowers and grasses that bloom in the springtime. In Autumn the prairie takes on a different kind of beauty. Leaves of the tall grasses turn beautiful shades of ...

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