EXPERIMENT STATION BULLETINS. 499 



texture occur. The ridges are usuall}^ composed of light sand. Tj^Dical 

 medium sandy soil makes up the undulating land, which contains sufficient 

 organic matter and fine soil particles to prevent blowing. In the draws and 

 low situations the texture is somewhat finer ranging from hea\^ medium 

 sand to typical sandy loams with very high contents of organic matter. 

 Occasionally in the swails the surface soil has been washed away and the 

 hea\'^' clay subsoil is exposed. 



DHSCRIPTION 



Light Sand. This soil is found on the ridges and is commonly spoken of 

 as blow sand. It is rather limited in extent and for the most part is covered 

 with vegetation which holds the sand in place. The surface 10 inches varies 

 from a yellow to yellowish brown medium sand, containing only a very small 

 amount of fine material. The organic matter content is exceedingly low. 

 The subsoil has the same texture as the surface soil, is only slightly lighter 

 in color and varies in depth from 3 to 30 feet. This sand rests upon the 

 impervious clay subsoil so tj^Dical of the lake bed area. 



1 ^ a.> r ^^ I CTJ.M .' ; 2:< .». js-TV': -MljgJ^: <y<iwg ;*.''gta' ^;a -t ■• 



Fig. 9. — The light sand soils are not very productive; especially is this true where the water level lies 

 too near the surface. Drainage and fertilization are needed. 



Typical Sand. This soil is quite extensive and furnishes the best agricul- 

 tural land in the sandy districts. The surface soil to a depth of ten inches 

 is a medium sand ranging in color from a dark yellow to light brown. It 

 contains a high per cent of fine material for a medium sandy soil, yet the 

 organic matter content is high enough to furnish typical sandy structure. 

 The subsoil is composed of sand somewhat lighter in color than the surface 

 and contains more fine soil particles. It varies in depth from only a few 

 inches to about 12 feet and is underlaid by impervious clay subsoil. In some 

 places the clay lies within 18 inches of the surface and in such cases it impedes 

 drainage. 



