A STUDY OF FACTORS INFLUENCING THE YIELD OF POTATOES 1223 



who used a combination of both large and medium-sized cut seed obtained 

 a more profitable net yield than did those who used either large or medium- 

 sized cut seed alone. 



So far as is possible from the data taken, the relation of type of seed to 

 yield in Monroe County is shown in table 57. More than a third of the 



TABLE 57. RELATION OF TYPE OF SEED TO YIELD ON 257 MONROE COUNTY 



FARMS IN 1913 



growers in this region used medium-sized cut seed in 1913. Judging from 

 the average amount of seed and fertilizer used by these same growers, 

 they obtained a more profitable net yield than did the growers who used 

 either large cut seed or large and medium-sized cut seed. The real expla- 

 nation as to why the group using medium-sized whole and medium-sized 

 cut seed obtained the lowest average yield, lies in the fact that these growers 

 used considerably less than the average amount of seed and fertilizer. 



Except that more whole seed was used in Franklin and Clinton Counties, 

 the types of seed used there correspond fairly closely to those reported for 

 Monroe County. The fact that about a third of the growers in this 

 region claimed to have used large cut seed indicates that these growers 

 use seed of larger average size than is used in any of the other regions. 

 The relation of type of seed to yield here is shown in table 58. The com- 

 parative yields from large cut and medium-sized cut seed agree very well 

 with the majority of the experiments previously cited, which showed 

 greater yields from the larger seed, due to the greater amount of seed 

 planted. The difference of- about 8 bushels per acre of average yield 

 between medium-sized cut and medium-sized whole seed, however, does 



