SIZE OF POTATO SETS. 
21 
ample, the average total production per acre from 6-ounce whole 
tubers for the years 1915 to 1918 was 485.98 bushels, whereas that 
from the 2-ounce halved tubers which showed the highest net yield 
of primes was only 365.6 bushels. The former produced only 61.5 
per cent of merchantable tubers, whereas the latter gave 81.1 per 
cent. The question might well be raised at this point whether the 
progeny of the 6-ounce whole tubers would not furnish the larger 
quantity of desirable seed stock. Under these circumstances the 
seed-potato grower should seriously consider the use of medium- 
sized whole tubers in the planting of his seed plat. 
Table 8. — Comparative yields from Irish Cobbler potato sets of different sizes at 
Presque Isle, Me., in stated years. 
[In the columns headed "Yield of primes, net" the quantity of seed planted has been deducted, making 
the number of bushels net, as given.] 
Weight 
of set. 
Yields per acre, 1914. 
Yields per acre, 1915. 
Kind of set planted. 
Primes. 
Culls. 
Yield oi 
primes. 
Primes. 
Culls. 
Yield oi 
primes. 
Actual. 
Net. 
Actual. 
Net. 
Whole: 
2-ounce 
Ozs. 
2 
3 
4 
5 
6 
1 
11 
2 
*%. 
3 
1 
1 
U 
n 
Bush. 
199.3 
285.9 
270.2 
Bush. 
151.3 
117.0 
148.2 
P.ct. 
56.8 
71.0 
64.6 
Bush. 
167.3 
237.9 
206.1 
Bush. 
538.8 
606.7 
515.3 
Bush. 
90.8 
139.2 
119.3 
P.ct. 
85.6 
81.3 
81.2 
Bush. 
506 8 
558 7 
4-ounce 
451 2 
5-ounce 
6-ounce 
508.0 
491.4 
524.9 
534.7 
191.8 
62.8 
83.4 
99.3 
72.6 
88.7 
86.3 
84.3 
411 9 
Halved: 
475 4 
3-ounce _. 
263.1 
300.1 
101.5 
133.9 
72.2 
69.1 
239.0 
268.1 
500 9 
444.6 
R-rinTif>fi 
6-ounce . 
476.6 
346.2 
426.6 
140.1 
37.5 
27.8 
77.3 
90.2 
93.9 
428.6 
Quartered: 
337 2 
410 6 
5-ounce - 
394.3 
25.6 
93.9 
370 3 
Weight 
Yields per acre, 1916. 
Yields per acre, 1917. 
Yields per acre, 1918. 
Kind of set 
Yield of 
Yield of 
Yield of 
planted. 
of set. 
Primes. 
Culls. 
Primes. 
Culls. 
Culls. 
primes. 
Ac- 
tual. 
Net. 
Ac- 
tual. 
Net. 
tua C l". Net - 
Whole: 
Ozs. 
Bush. 
Bush. 
P.ct. 
Bush. 
Bush. 
Bush. 
P.ct. 
Bush. 
Bush. 
Bush. 
P.ct. Bush. 
2-ounce 
2 
188.2 
129.7 
59.2 
164.2 
237.0 
100.4 
70.2 
213.0 
240.4 
111.8 
68.3 
216.4 
3-ounce 
3 
181.8 
168.8 
51.9 
145.8 
207.7 
108.7 
65.6 
171.7 
223.1 
135.5 
62.2 
187.1 
4-ounce 
4 
248.2 
111.8 
68.9 
200.2 
237.9 
142.1 
62.6 
189.9 
213.1 
159.9 
57.1 
165.1 
5-ounce 
5 
226.2 
177.3 
56.1 
166.2 
239.9 
130.8 
64.7 
179.9 
220.4 
175.4 
56.7 
160.4 
6-ounce ... 
6 
202.6 
199.2 
50.4 
130.6 
262.3 
173.7 
60.2 
190.3 
221.8 
184.5 
54.6 
149.8 
Halved: 
2-ounce. .. 
1 
246.1 
83.4 
74.7 
234.1 
226.8 
70.0 
76.4 
214.8 
221.1 
60.8 
78.4 
209.1 
3-ounce.. . 
li 
201.6 
105.8 
65.6 
183.6 
235.7 
60.9 
77. 1 
217.7 
236.8 
72.7 
76.5 
218.8 
4-ounce .. 
2 
216.9 
127.4 
63.0 
192.9 
257.1 
83.1 
75.6 
223.1 
246.8 
91.8 
72.9 
222.8 
5-ounce. 
2J 
220.6 
119.8 
64.8 
190.6 
266.4 
79.1 
77. 1 
236.4 
233.6 
104.8 
69. 
203.6 
6-ounce 
Quartered : 
3-ounce ... 
3 
184.9 
161.2 
53.4 
148.9 
274.2 
92.7 
74.7 
238.2 
216.7 
124.1 
63.6 
180.7 
3 
213.2 
48.8 
81.4 
204.2 
209.5 
48.0 
81.4 
200.5 
226.9 
44.4 
83.6 
217.9 
4-ounce. .. 
1 
238.9 
64.4 
78.8 
226.9 
258.7 
55.3 
82.4 
246.7 
230.3 
44.3 
83.9 
218.3 
5-ounce 
u 
213.2 
87.3 
70.9 
198.2 
210.9 
50.3 
80.7 
195.9 
270.5 
51.3 
84.1 
255.5 
6-ounce 
1* 
193.0 
101.6 
65.5 
175.0 
256.7 
59. 1 
81.3 
23S.7 
243.8 
63.8 
79.3 
225.8 
85070°— 24T- 
