Rohtlad-kliima-taimestik
the early European settlers brought them almost to extinction by the beginning of the twentieth century. Since
then, due largely to the efforts of the American Bison Society, herds have steadily been built up in reserves,
where they live in a semiwild state, and it is estimated that there are now some 20,000 animals.
11. Vali vasakult menüüst What are Grasslands like. Mis on juhtunud looduslike preeriatega?
Grasslands receive about 10 to 30 inches of rain per year. If they received more rain, the grasslands
would become a forest. If they received less, they would become a desert. Grasslands are often located
between deserts and forests.
12.
Viljakate muldade tõttu on rohtlad praeguseks enamasti üles haritud.
Sajandeid tagasi elatuti neil aladel peamiselt küttimisest, hiljem hakati pidama
kariloomi ja veel hiljem teravilja kasvatama.
annaabi.ee 
