Desertification in North America. The Great Plains (The Dustbowl). Moderate 25 - 75% of topsoil lost. Severe more than 75% of topsoil lost. Background to the Dust Bowl 1.
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The Great Plains
25 - 75% of
more than 75% of topsoil lostBackground to the Dust Bowl 1
Despite more than 50 years of soil conservation practice, soil erosion remains one of the USA’s most severe environmental problems.
Like the African Sahel, the interior grasslands of North America cover an immense area. They extend nearly 4000km from Texas in the south to Alberta in the north at least 800km from east to west.
NOTE DOWN ANYTHING THAT YOU NOTICE FROM THE VIDEO
People struggling to stand up (using the fence to get along)
Things blowing everywhere
Massive clouds of dust
Dangerous driving conditions
Large build up (dunes) of soil & dust
Houses covered in soil & dustWhat did you spot in the video?
Add summary notes on Laser levelling, Minimum Tillage, cell grazing, bison ranching.
THE DUST CLOUDS WILL RETURN
1. Great Plains farming had become fully industrialised with short-term profit being seen as more important than maintenance of soil quality.
‘surviving the dustbowl’ documentary. (transcript is in the rural land degradation folder)