CHAPTER III 



KINDS OF SOILS AND HOW TO MANAGE THEM 



SOILS may be classified according to their 

 origin or according to their composition. 

 With respect to origin all soils are either 

 transported or sedentary; that is, they are composed 

 of materials that have been moved by some natural 

 agency, as wind, water, or ice, as discussed in 

 Chapter I, or they have been made by the weather- 

 ing of rocks or the decay of plants in the places 

 where they now are. In one sense all soils are both 

 sedentary and transported, since they have all 

 received more or less material from other sources ; 

 but these terms are meant to apply in a broad 

 sense. 



SEDENTARY SOILS 



In a general way the soils in that part of Northern 

 United States which was covered by the great 

 glacier are mostly transported, while the soils 

 farther south, and east of tne Mississippi River, are 

 mostly sedentary. Sedentary soils are usually not 

 deep, because the mother rock beneath weathers 

 very slowly, being largely protected by the soil 

 above it. The red clay stalls of Tennessee, Georgia 

 and other parts of the South, and the famous "blue 

 grass soil" of Kentucky, derived from limestone, 

 are excellent illustrations of a sedentary soil. 

 They fere usually very fertile. 



Other examples of a sedentary soil are muck and 



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