Farming and Croppage of Soils.
Dry land farming and overgrazing contributed to the dust storms in the Great Plains in the 1930s.
i don't no ,you tell me ,please answer this question
The earth is about 4.5 billion years old. This has been established by careful analysis of radioisotope ratios in rock. This date was derived by the 1930s, and has not changed (on the basis of better evidence) over the past seventy years. Further studies in the 1950s arrived at the same conclusion, as have subsequent studies over the ensuing decades.
It depends on what you mean by "soil". If you just mean soil in the sense of "plain old dirt", then it's inexhaustible for all practical purposes because the actions that produce it (erosion, decomposition, weathering, etc) are constantly occurring. If by "soil", though, you mean "fertile soil that is usable for agricultural purposes", then that is a very finite, exhaustible resource. Ask anyone who lived through the Dust Bowl of the 1930s how "inexhaustible" their farm's soil was. Fertile soil has a finite amount of the minerals and chemicals (nitrogen, phosphorous, vitamins, etc) that plants needs to grow, and if you grow plants in an area for a long time without replacing the nutrients that are used up, you'll eventually have a patch of dead dirt.
- The magnitude of an earthquake can be measured on a scale called Richter scale.- A Richter scale assigns a number each earthquake. This is also known as the Richter magnitude scale.
Dry land farming and overgrazing contributed to the dust storms in the Great Plains in the 1930s.
Drought and massive dust storms worsened economic conditions in the Great Plains.
A dust storm can be a natural disaster. It could also be just an annoyance. The midwestern dust storms of the 1930s were a natural disaster, but the root cause was human. Dust storms in the high plains, the Sahara, and many other places are simply natural events.
the great depression.
Racial discrimination.
The dust bowl drought of the 1930s was a natural disaster which resulted in some three million people walking off their farms in the Great Plains. The ploughing of the natural vegetation of the grasslands, and the planting of wheat which could not survive the drought, resulted in the exposure of tonnes of bare earth, which in turn gave rise to continuous dust storms.
how was the law different for blacks
a. devastating droughts and dust storms throughout the 1930s.
The Great Dust Bowl
Insufficient Rainfall
They moved from the great plains
they moved from the great plains