SIZE OF POTATO SETS. 
25 
The results of the 1916 test, as indicated by the data presented in 
Table 10, show that the 2-ounce whole tubers produced the heaviest 
net yield of merchantable tubers, 4-ounce halved and whole and 3- 
ounce whole sets being close competitors. The 6-ounce quartered 
seed gave the lowest net yield of primes. 
A study of the total yield given in Table 10 shows that the 6- 
ounce tubers gave the largest yield. The 5 and 4 ounce whole 
tubers were very close competitors with each other, in the order 
named. In 1917 considerably larger yields were obtained than in 
the preceding season. As in 1916 the 2-ounce whole tubers gave 
the largest net yield of primes, closely followed by the 6-ounce and 
5-ounce whole seed; 3-ounce and 4-ounce whole seed gave some- 
what lower yields. In total yield the 6-ounce whole seed stands at 
the head of the list. The 5-ounce and 4-ounce whole tubers were 
/oo 
200 
<3pO 
400 
e-Oi/A/C/E' &/?£&£& 
&- * 
4- - 
6- " 
y3-OOA/C£T QW?/ST£je£D 
S- 
<5- 
£ XW?A/ S?T/OA/ 
Fig. 4.— Average yields in bushels per acre from Rural New Yorker No. 2 potato sets of different weights 
at Greeley, Colo., in 1916 and 1917. 
next in order, with the 3-ounce and 2-ounce whole tubers following. 
The studies in 1918 also show the heaviest net yield to have been 
produced from 2-ounce whole tubers, with 2-ounce halved next, 
followed by 4-ounce halved and 1-ounce whole sets. The average 
net yields for the two seasons, 1916 and 1917, place the 2-ounce 
whole seed first so far as the crop of primes is concerned. The 4- 
ounce and 3-ounce whole tubers were the next heaviest producers, 
while the 2-ounce halved and 3-ounce quartered sets gave least. 
The 6-ounce, 5-ounce, and 4-ounce whole tubers gave the largest 
total yields. (Fig. 4.) The averages for 1916 to 1918 show that 
the 2-ounce whole sets produced the highest net yield of primes, 
the 3-ounce whole sets second, and the 4-ounce halved sets third. 
