SOILS OF THE EASTERN UNITED STATES AND THEIR USE-XXIX. 



THE CROWLEY SILT LOAM. 



GEOGRAPHICAL DISTRIBUTION. 



The Crowley silt loam is of limited distribution. It is found prin- 

 cipally in the southern and southwestern parishes of Louisiana and 

 in the Arkansas counties lying between the Arkansas and the White 

 Rivers. It has been encountered thus far in only three soil-surve} r 

 areas located in these two States. It is probable that its region of 

 distribution extends from Acadia Parish, La., westward through 

 the lower lying Gulf prairie section of southwestern Louisiana and 

 into eastern Texas, and includes the area already mentioned in east- 

 central Arkansas. . A total area of 477,120 acres of the Crowley silt 

 loam has been encountered in the three soil surveys made in central 

 Arkansas and southwestern Louisiana. 



CHARACTERISTICS OF SOIL AND SUBSOIL. 



The Crowley silt loam is a brown or ashy gray silt loam ranging 

 in depth from 10 to 16 inches, underlain by a gray or mottled heavy 

 silt loam or silty clay, which frequently contains concretions of iron 

 and calcium carbonate. The subsoil ranges in color from gray to 

 reddish yellow, mottled with red and brown, and is stiff and imper- 

 vious in all localities where it has been encountered. 



SURFACE FEATURES AND DRAINAGE. 



The Crowley silt loam occupies level to very gently undulating 

 prairie areas both in the Louisiana region and in central Arkansas. 

 These prairies are frequently separated or interspersed by timbered 

 areas along the larger streams or by small groups and clumps of 

 trees. Otherwise the surface of the type is practically free from 

 timber and very level. In absolute elevation above sea level the 

 surface of this type ranges from 25 to 30 feet in the extreme southern 

 part of Louisiana to altitudes in excess of 200 feet in central Arkan- 

 sas. In all cases, however, the surface of the type lies at an elevation 

 of not over 25 or 30. feet above the local drainage lines. 



