20 BULLETIN 1143, U. S. DEPARTMENT OF AGRICULTURE. 
(Table 4). An average of 5.5 spring pigs has been used. It took 
these pigs an average period of 20 days, extending from September 
20 to October 10, to harvest the acre. The average total weight of 
these pigs was 426 pounds at the beginning of the period, and they 
ained an average of 119 pounds. The average daily gain per pig 
or the four years was 1.19 pounds per day. 
TABLE 4.—Results obtained by pasturing 1 acre of corn with spring pigs at Huntley, — 
Mont., in 1916, 1917, 1918, and 1920. 
e 
Weights of animals and feed (pounds). | 
| Pasture period. 
i Corn con- : 
Num- Hog weights. Yield of 
Wear ber SEL check 
“This Nl putes 
pigs | Daily ag (bushels). 
Date on. | Date off. |Days.; Initial.; Final. | Gain. ne Total. | pound 
ly of gain. 
pig. 
BOIG? 2 22-58 4} Sept. 30} Oct. 9 9 435 506 71 1.97 924 | 13.00 16.5 
NOME Sess 6 | Sept. 28 | Oct. 15 17 442 545 | 103 1.01 538 5. 22 9.6 
Hae wee cikafaie 6 | Sept. 6 | Sept. 18 12 442 496 54 -75 448 8. 30 8.0 
Sepia et (esi tra 1] A lee eRe He Ri Ree Sa Ss ARE Fe ey | Peake: ra 4] Dee “ee | UES mecha ARE Sis | Sc eee 
S20 Ee Se 6 | Sept. 18 | Oct. 29 41 387 635 | 248 1.01 806 3.25 14.4 
Average, 
4 years.| 5.5 | Sept. 20 | Oct. 10 20 | 426 | 545 | 119 1.19 679 7.44 12.1 
1 Yield of check plat. 2 Cora dried up before making grain. 
The average yield of the check plat was 12.1 bushels per acre. 
With this yield as a basis, the pigs averaged 1 pound of gain for each 
7.44 pounds of corn eaten. An average of 57 pounds of alfalfa hay 
was fed with the corn. 
APR. MAY JUNE SULLY AIUG. SEPT. OCT. 
—— 
ee ttd Wt. 
mere as | i eg 
oe Z 
ree. eee LPL Ylllu 
19/5 
19716 | 
| 
49/7 
19/8 
1919 
1920 
ee O 
ahs __ISARLEY LQ CORN 
Fic. 1.—Diagram showing graphically the period in each year during which pigs were pastured on rye, 
& peas, barley, and corn and the gain made while on each crop and between each weighing, arranged to 
show the combined gain on rye, peas, and barley. 
1921 — 
Figure 1 presents graphically the data obtained from this rotation 
each year. The base line of each figure represents the initial weight of 
the hogs. The increase in height of the figure represents the increase 
in weight of the hogs as the season progresses. In other words, the. 
