20 BULLETIN 1381, U. S. DEPARTMENT OF AGRICULTURE 
TaBLeE 13.—Percentage distribution of gains after weaning, by cost groups 
Spring Fall 
Kind of pigs 
1921 1922 1921 1922 
‘Total pounds gained after wéeaning.°"*. 93.272. 2 Fs ee tes 700,678 | 549,493 | 107,519 158, 811 
Cost group (per cent of above totals): 
= 3 Sigh SRI ae il EO a en tane a inks sie b peas Pele pitino Me by Me eh w tie ahh i PSP Soe bara Popmabte Shesba a) eu) ak. 
a hO pds 20a s Ces) YN ee ee ea YE ee ee ee EEE 36 4 65) eee 
CE EE re Fe OR re ee Pe ee ee See 46 25 56 10 
SOO On ee | a AR Se rl seen EAST ie, oe 4 55 16 13 
UO) RO os ace des ot Ec Be hb ae ee ee a a EER 4 13 10 51 
DUO 98-8 as nea et eee ae ee ne eee aaah oe aye Cee ee eens 8 20 
EGO 0. ee th See vie fits ee ee Se eee Beier ey Pe OP 2 4 6 
POtO SIONS ae = on 2 ad ah oe ee oe ge Al eet de ee eee 
RE SS 3 a ee A ae ES ae See ks SS or a Be eS ee eS : he SE eS A 
QUANTITIES OF FEED AND LABOR REQUIRED FOR 100 POUNDS GAIN ON SPRING 
AND FALL PIGS 
The fattening period of spring and fall litters may also be compared 
in terms of the quantities of feed and labor necessary to produce 100 
pounds gain. The average quantities of feed, pasture, and labor con- 
sumed by the spring and fall pigs of 1921 and 1922 are given in 
Table 14. A combined average of these two years is also given for 
Fic. 9.—Fields were arranged on this farm so that to get to the cornfield from the watering trough 
hogs had to cross a patch of soy beans. This lessened the risk of turning hogs out into the corn 
spring and for. fall litters. This combined average is based on the 
items necessary to produce 1,250,171 pounds gain on spring pigs 
and 266,330 pounds on fall pigs. The average corn consumed per 
100 pounds gain by the spring pigs was 375.8 pounds and 404.8 
pounds by the fall pigs, or a difference of 29 pounds in favor of the 
spring pigs. Other farm-grown feeds and purchased protein supple- 
ments were fed in larger quantities to the fall pigs than to the spring 
pigs. The smaller quantity of grain consumed by the spring pigs 
may be due in part to the greater use of pasture, as the spring pigs 
