Vol. X JULY 23, 1917 No. 4 



JOURNAL OF 



AGRICULTURAL 



RESEARCH 



GQNTKNTS 



Page 

 A Colletotrichum Leaf spot of Turnips - - - - 157 



B. B. HIGGINS 



Black Rootrot of the Apple - - - - - - 163 



F. D„ FROMME and H. E« THOMAS 



Physiological Effect on Growth and Reproduction of Rations 



Balanced from Restricted Sources - - - - 175 



E. B. HART, E. V. McCOLL0M, H: STEENBOCK 

 and G. C. HUMPHREY 



Toxic Values and Killing Efficiency of the Arsenates - IP!) 



A. L. LOVETT and R. H. ROBINSON 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE, 



WITH THE COOPERATION OF THE ASSOCIAIION OF AJMERICAN 



AGRICULTURAL COLLEGES AND EXPERIMENT STATIONS 



WJ^SI-^INOTOK, r>* Cc 



W*«IIH<)TO« : COVeilH'irCNT pniMTIKO OfTIOK : !»tT 



