The drought came in three waves, 1934, 1936, and 1939–40, but some regions of the high plains experienced drought conditions for as many as eight years.[1] With insufficient understanding of the ecology of the plains, farmers had conducted extensive deep plowing of the virgin topsoil of the Great Plains during the previous decade; this had displaced the native, deep-rooted grasses that normally trapped soil and moisture even during periods of drought and high winds.
The drought came in three waves, 1934, 1936, and 1939–40, but some regions of the high plains experienced drought conditions for as many as eight years.[1] With insufficient understanding of the ecology of the plains, farmers had conducted extensive deep plowing of the virgin topsoil of the Great Plains during the previous decade; this had displaced the native, deep-rooted grasses that normally trapped soil and moisture even during periods of drought and high winds.
user
Засуха прийшла в три хвилі, 1934, 1936, і 1939-40 роки, але в деяких регіонах високих рівнин тривала впродовж цілих восьми років.[1] Протягом попередніх десяти років, недостатньо розуміючи екологію рівнин, фермери проводили екстенсивну глибоку оранку цілинного поверхневого шару ґрунту на Великих рівнинах. Це знищувало місцеві, глибоко вкорінені трави, які зазвичай зберігають цілісність ґрунту і утримують вологу навіть у періоди посухи і сильних вітрів.
assistant