SOME CONDITIONS INFLUENCING THE YIELD OF HOPS. 7 



the entire ^ield. The accoinpiinying figure (fig. 2) shows graj^h- 

 icall}^ the relationship between these three groups. 



Figure 2 will serve, also, in forming some conception of type with 

 respect to yield from the hills of an entire field. A study of the hills 

 of group 1 shows that for various reasons they are less productive 

 than those usually regarded as average or representative hills. Simi- 

 larly, the hills of grou}) ?> are few in number and may be considered 

 as exceptional and their occurrence expected far less often than that 



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Fig. 2. — Diagram showing tlic ratio of th(> number of hills to the production of liops in 

 three groups of low, nirdium, and high yielding hills. 



of the hills of the other groups. It seems, therefore, that among the 

 hills of group 2, where the bulk of the yield was obtained, the typical 

 hills with respect to yield may be expected to occur. Assuming, then, 

 that the prevailing type of normal hills with respect to yield lies 

 between those producing G and (hone producing 12 pounds, there is 

 every reason for giving .si)ecial attention to the hills low in yield for 

 the purpose of bringing them to a higher state of productiveness. 



The fact should not be lost sight of that the average yield for this 

 acre, 6.1+ pounds per hill, lies just above the loAver limit of yield in 



[Cir. 5G] 



