SOME CONDITIONS INFLUENCING THE YIELD OF HOPS. 5 



actually bearing hops. This gives an absohite reduction of 104 hills, 

 or 10.8 per cent. Had the entire number of hills been in bearing the 

 yield would have been 12.1 per cent greater lliaii that actually ob- 

 tained. 



The distribution of the hills having vines with no hops and of the 

 missing hills is shown on the accompanying diagram (fig. 1). The 



Fig. 1. — Diagram showing tlie distriliution of nonproductivo and missing liills of hops on 

 the experimental acre in California. #= Vines bearing no hops; X = missing hills. 



dots indicate the hills having vines bearing no hops, and the crosses 

 the missing hills. This distribution appears to be entirely one of 

 chance and not due to variation in the soil, imperfections in the 

 drainage, or other purely local factors. 



LCir. 56] 



