UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



AGRICULTURAL SCIENCES 



Vol. 3, No. 9, pp. 243-270, 2 text figures June 22, 1918 



VARIABILITY IN SOILS AND ITS SIGNIFI- 

 CANCE TO PAST AND FUTURE 

 SOIL INVESTIGATIONS 



I. A STATISTICAL STUDY OF NITRIFICATION IN SOILS 



BY 



DEAN DAVID WAYNICK 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



