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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 

 gained an average of 119 pounds. The average daily gain per pig 

 for the foiir 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. 





Num- 

 ber 

 of 



pigs. 









Weights of animals and feed (pounds). 





Year. 



Pasture period. 



Hog weights. 



Corn con- 

 sumed. 1 



Yield of 



check 



plat 



(bushels). 





Date on. 



Date off. 



Days. 



Initial. 



Final. 



Gain. 



Daily 

 gain 

 per 

 pig- 



Total. 



Per 



pound 

 of gain. 



1916 



1917 



1918 



19191 



4 



6 

 6 



Sept. 30 

 Sept. 28 

 Sept. 6 



Oct. 9 

 Oct. 15 

 Sept. 18 



9 

 17 



12 



435 

 442 

 442 



506 

 545 

 496 



71 

 103 

 54 



1.97 

 1.01 



.75 



924 



538 

 448 



13.00 

 5.22 

 8.30 



16.5 

 9.6 



8.0 



1920 



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. 



a Corn 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. 



/9/5 



/9/6 



/9/7 



/9/8 



/9/9 



/920 



/92/ 



rtPX. 



M#Y 



JUNE JULY 



&L/G. 



SEPT. 



OCT. 



CORN 



Fig. 1.— Diagram showing graphically the period in each year during which pigs were pastured on rye, 

 |. peas, barley, and corn and the gain mado while on each crop and between each weighing, arranged to 

 show the combined gain on rye, peas, and barley. 



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 



