46 Influence of Size of Seed on Yield of Pot\toes. TApr., 



The crop from the small chat tubers produced a greater per- 

 centage of large ware than those from the heavy seed. 



As the value of a potato crop is concentrated in the main on 

 the quantity of the large ware size tubers formed, it is of interest 

 to refer to the last column in Table II where the percentage of 

 the entire crop represented by the tuber of 4 oz. and over is 

 shown. The highest value, viz., 73 per cent, of the total crop 

 is given by seed tubers of less than 1 oz. in weight, I.e.. by chats, 

 so that it would appear the larger the set the smaller the quantity 

 of big ware. When, however, the fact is taken into account 

 of the bigger crop thrown by the 2 oz. sets the total yield per 

 acre of large ware is considerably greater in this than in any 

 other class. If, however, cut tubers with secondary growth will 

 yield in the same manner as the large ones of Class 8, then the 

 advantage of such sets might at least equal that of the 2 oz. set 

 in the production of heavy ware. 



A further analysis was made of the crops from the 8 different 

 sized sets, as well as one from mixed sets in respect to the 

 number of tubers in each weight group. Table III shows the 

 result as well as the weight of the sample, and the total number 

 of tubers contained in it. 



TABLK III. 





Percentage of Number of Tubers 

 in each Class of Yield. 



Seed Class. 



Weight 

 of 



Sample. 



No. f 

 Tiihers in 

 Sample. 



Under 

 1 oz. 



l-U oz. 



U-2-6 oz. 



3-4 ioz. 



5 oz. and 

 over. 



1. 



2. 

 3. 

 4. 



6. 

 7. 

 8. 



0- 44 oz. 



1- 33 oz 



2- oz. 

 2-66 oz. 



4- oz. 



5- 33 ()■/.. 

 5-66 oz. 



() oz. with 

 outgrowths 



4b. 

 32-12 



30-5 



29-25 



30 



29- 35 

 30 



30- 5 



36-5 



156 

 204 

 159 

 . 160 

 207 

 16(5 

 205 



263 



12-8 



24- 5 

 14-5 



25- 

 28-8 

 19-3 

 18-5 



23-5 



15- 4 

 19-6 



7-55 

 6-9 



16- 9 

 15-7 

 21-5 



18-3 



24-3 

 31-0 

 43-5 

 28-8 



34- 8 



35- 5 

 37-0 



34-3 



30-7 

 11-8 

 17-6 

 20-0 

 11-2 

 13-2 

 13-7 



13-7 



16- 7 

 13-3 



17- 



18- 8 



8- 2 

 16-3 



«)-3 



9- 6 





Average of 

 8 Classes 



31 



190 



20-8 



15-2 



31-3 



16-5 



13-7 





Mixed Seed 



27-6 



154 



19-5 



11-6 



30-5 



23-5 



15-0 



It does not appear that any inference can be drawn from these 

 figures, except that small sets do not tend tapi'odace any undue 

 proportion of their like, nor large sets of theirs. There is far 

 less conformity between the numbers of tubers in the same 

 groups of the yields from each of the 8 crops than there was 

 in the case of the corresponding weights of the tubers. This 



