Vol. XIII JMAY 27, 1918 No. 9 



JOURNAL OP 



RESEAiCH 



CONTKNXS 



Page 

 Pot or Pit (Soilrot) of the Sweet Potato - - - 437 



J. J. TADBENHAUS 



(Contribution from Texas Agricultutal EzpeHmeat Station) 



Boron: Its Effect on Crops and Its Distribution in Plants 



and Soil in Different Parts of the Uijited States - 451 



F. C. COOK and J. B. WILSON 



(Contribution Irom Bureau of Cbemistry ) 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIATION OF AMERICAN 



AGRICULTURAL COUEGES AND EXPERIMENT STATIONS 



^WIASHINOTON, D. C. 



WASHIHQTON : OOVERNMENT PBINTINa OFFICE ; l»IS 



