290 



Journal of Agricultural Research 



Vol. XIX, No. 7 



1914, first cutting, r = o. 432 ±0.040, rlEj.= 10.7. 

 1914, second cutting, r= .449± .040, r/Ej.= ii.:^. 

 1 914, third cutting, r= .31 1± .052, r/Er= 5.99. 



Fig. 6. — Diagram showing yield of alfalfa in third cutting, 1914, on the Huntley experimental tract. 

 The yield is expressed in pounds per third plot. 



It will be noted that the results are in very close agreement indeed for 

 1 91 4. The second cutting for 191 3 differs significantly from the others, 

 but no explanation can be suggested. 



