How intensive was the farming of winter wheat in the Dust Bowl region? Census data from 1930 and 1940 can help provide a picture; a picture that can be used to examine changes over the decade of the 1930s. Open the Dust Bowl: Population & Agriculture maps and display the Census & Agriculture - 1930 layer on one and the Census & Agriculture - 1940 layer on the other along with the Area of Worst Dust Storms - 1935 layer and the same basemap for each. Turn any other open layers off. Click on any county and the pop-up will reveal the nature of the data you have about each county. Note that the available data is somewhat different for the two decades.
|• Navigate your map
• Change the basemap
• Zoom in/out
• Display data in a table
• Open a feature's pop-up window
• Use a bookmark
• Change feature styles
• Filter data
• Measure distance/area
• Share your map
Choosing a basemap
Viewing web maps-Navigate
The 1930 layer shows the number of bushels of winter wheat harvested that year divided by, or normalized by, the number of harvested acres in each county including wheat and other crops. That is, it shows the amount of wheat harvested per acre of agricultural land. The data is colored light green to dark green from least to most harvested.
• Select the 1930s layer Change Style option and click on the Options button.
• You can click on the Symbols button to change the shading pattern.
• Note that the sliders are set at 0 and 8.0 bushels per acres.
Go to the other map and change the symbols on the 1940 layer to show the same variable using the same color classification and slider settings.
Notice that at the bottom of the pop-up for each county there is a column graph showing the percentage of acres of winter wheat harvested compared to all harvested acres in the county including wheat and other crops. The graph has also been normalized - again so you can see the rate at which the harvested land is used for wheat.
Show Table for the 1930s and 1940s layers and click on the Bushels of Winter Wheat column to sort the data in either ascending or descending order. Notice that if you click on data in any row the corresponding county is highlighted in the map. You now have side-by-side maps that will allow you to compare the intensity of winter wheat farming in the Dust Bowl counties across the decade of the 1930s.
1) In relation to the worst 1935 dust storms, where was the most winter wheat harvested in 1930? in 1940?
2) Look at counties within the area of the worst dust storms in 1935 on both maps. Describe the general pattern of change in winter wheat production 1930 to 1940.
3) Sometimes what is most interesting when looking at a pattern are the exceptions to the general rule. Identify an exception to the general pattern of change you noted in the worst dust region and describe the ways in which the county is different than those surrounding it.
4) Did the number and size of farms on the Great Plains change over the decade of the 1930s? Prepare side-by-side data maps using natural breaks in the data to compare both the number of Dust Bowl farms and their average size for 1930 and 1940.
a) What geographic pattern do you notice in the maps showing the average size of farms? How does this pattern compare with that in the maps showing the number of farms in each county?
b) How did the number and size of farms in the Great Plains change over the Dust Bowl decade?
c) Discuss any general conclusions that you draw in comparing your maps. Make sure that you identify any exceptions to the generalizations you discuss.
5) Did the practice of tenant farming in the Great Plains change over the decade of the 1930s?
a) Examine the data categories available to you in the census files for 1930 and 1940. List the specific categories for each year that might lend themselves to addressing the question.
b) Prepare side-by-side maps using the data you have identified.
c) Use your maps and write a short analysis of the information presented.
6) Write your own question about farming in the Dust Bowl region of the Great Plains during the decade of the 1930s based on the census data available to you. Prepare appropriate maps and tables and write a short summary of your conclusions.