UNIVERSITY OF CALIFORNIA PUBLICATIONS 



IN 



AGRICULTURAL SCIENCES 



Vol. I, No. 6, pp. 127-139 March 28, 1914 



THE EFFECT OF COPPER, ZINC, IRON AND 



LEAD SALTS ON AMMONIFICATION 



AND NITRIFICATION IN SOILS 



BY 



C. B. LIPMAN AND P. S. BURGESS 



UNIVERSITY OF CALIFORNIA PRESS 

 BERKELEY 



