116 SOIL PHYSICS AND MANAGEMENT 



52. Gray loam. 



53. Yellow loam. 



54. Mixed loam usually first bottom land. 



Sandy loams soils with 50 to 75 per cent of sand and less than 15 

 per cent of clay. 



60. Brown sandy loam. 



60.1 Brown sandy loam on clay. 



60.2 Brown sandy loam on sand. 



60.4 Brown sandy loam on gravel. 



60.5 Brown sandy loam on rock. 



60.6 Light brown sandy loam. 



61. Black sandy loam, 



62. G*ay sandy loam. 



64. Yellow-gray sandy loam. 



64.4 Yellow-gray sandy loam on gravel. 



64.5 Yellow-gray sandy loam on rock. 



65. Yellow sandy loam. 



65.5 Yellow sandy loam on rock. 



66. Brown sandy loam over gravel. 



67. Yellow-gray sandy loam over gravel. 



68. Brown-gray sandy loam on tight clay. 



Fine sandy loams soils with from 50 to 75 per cent of fine sand and 

 with much silt and less than 15 per cent of clay. 



70. Black fine sandy loam. 



71. Brown fine sandy loam. 



71.5 Brown fine sandy loam on rock. 



72. Gray fine sandy loam. 



73. Mixed fine sandy loam. 



74. Yellow-gray fine sandy loam. 



75. Yellow fine sandy loam. 



76. Mixed sand and loess. 



77. Brown fine sandy loam over sand. 



Sands soils with more than 75 per cent of sand. 



80. River sand. 



81. Dune sand. 



82. Beach sand (Lake Michigan). 



83. Residual sand. 

 86. Fine dune sand. 



Gravelly loams soils with 25 to 50 per cent of gravel with much 

 sand and little silt. 



90. Gravelly loam. 



Gravels soils with more than 50 per cent of gravel and much sand. 



95. Gravel. 



Stony loams soils containing large numbers of stones over one inch 

 in diameter. 



98. Stony loam. 



Rock Outcrop. 



The complete type number may be formed in each by prefixing 

 the number of the area or sub-province in which it occurs. 



SOIL SURVEYS. 



In order to make a scientific study of soils and to apply the 

 knowledge to practical agriculture, it is very desirable that the 

 samples studied be taken from areas that are representative of more 



