SOIL SURVEY OF LOUISA COUNTY, IOWA. 



27 



range from 15 to 40 bushels, with nn average of about 25 })ushels 

 ])er acre. Yiehls of other crops, the methods of liandliiig the soil 

 and land values are about the same as in the case of the Grundy silt 

 loam. 



The following table gives the results of mechanical analyses of 

 samples of the soil and subsoil of the Muscatine silt loam: 



Mechanical analyses of Muscatine silt loam. 



MUSCATINE SILTY CLAY LOAM. 



The Muscatine silty clay loam has a surface soil of black silty 

 clay loam, underlain at a depth of 10 inches by a black silty clay, 

 which at 16 inches becomes tinged with gray and at 22 inches changes 

 to light gray or light bluish gray, mottled with yellowish brown: 

 The subsoil becomes heavier textured and more plastic with depth, 

 and at about 32 inches the mottled color general!}^ gives way to 

 uniform gray. With the exception of one small area near the 

 headwaters of Johnny Creek, this type is confined to the eastern 

 upland, where it occurs in small areas, the largest of which is proba- 

 bly not over 50 acres, within areas of the Muscatine silt loam. In 

 most places it occupies level fiats on drainage divides, but in a few 

 instances occurs in low, depressed flats. Natural drainage is only 

 poor to fair, but, owing to the smallness of the areas and the near- 

 ness to slopes and hollows, ditching and tiling provides good drain- 

 age. 



This type is of small extent, but it is very important agriculturally. 

 Except for the substitution of winter wheat in place of spring wheat, 

 the crops, yields, cultural methods, and land values are the same as 

 in the case of the Grundy silty clay loam. The same suggestions 

 should be adopted for the improvement of farm practices. 



Mechanical analyses of samples of soil and subsoil of the Muscatine 

 silty clay loam gave the following results : 



Mechanical analyses of Muscatine silty clay loam. 



