ARE YOU SAVING YOUR MONEY TO INVEST IN THE NEXT ISSUE OF 

 THE LIBERTY LOAN? 



Vol. X SEF»TE:ivIBEiR lO, 1917 No. 11 



JOURNAL OF 



AGRICULTURAL 



RESEARCH 



CONXKNXS 



P«te 



Formation of '* Black Alkali" (Sodium Carbonate) in 

 Calcareous Soils .------- 541 



J. F. BRBAZSALB 



PDBUSHED BT AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPIRATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



AVASHINGXON, D. C. 



nnuEB>u>rilT DRINTina OPPIOE 1 101) 



