CARBON, PHOSPHORUS AND NITROGEN IN SOILS 



107 



TABL.E 8 RATIOS OF CARBON AND NITROGEN IN ILLINOIS SOILS 



The Rothamsted work furnished information regarding the 

 nitrogen-carbon ratio of the soil in nine inch sections to a depth of 

 90 inches. These results will be found in Tables 9 and 10. The 

 ratio for the Broadbalk wheat fields varies from i 19.5 to 4.8 for 

 the surface and ninth 9 inches respectively. After the fifth 9 inches 

 there is very little change in the ratio. In the Hoosfield barley 

 soils the ratio varies from i :io.6 to i :8.8 for the surface and sub- 

 soil respectively. 



TABI,E 9. BROADBALK WHEAT Soii,s: RATIO OF CARBON To NITROGEN 



TABI.E 10. HOOSFIEI,D BARLEY Soii<s: RATIO OF CARBON To NITROGEN 



