148 SOILS: PROPERTIES AND MANAGEMENT 



Other depth relationships, especially regarding the 

 proportions of carbon, humus, and nitrogen, are brought 

 out in the following data, obtained by Alway and Vail ! 

 in the study of Nebraska Soils : — 



Composition op a Nance County, Nebraska, Soil near 



Genoa 



1 Alway, F. J., and Vail, C. E. The Relative Amounts 

 of Nitrogen, Carbon, and Humus in Some Nebraska Soils. 

 Nebraska Agr. Exp. Sta., 25th Ann. Rept., p. 155. 1912. 



