FEEDS FOR SWINE 657 



100 Ibs. of tankage. Even without considering the injurious effect of 

 this ration on some of the pigs, linseed meal was worth no more per 

 ton than corn in these trials. 



Compared with these poor results, linseed meal and corn produced 

 nearly as good gains as tankage and corn when fed to well-grown pigs 

 or to pigs on first-class pasture. Fed under such conditions, 100 Ibs. of 

 linseed meal was worth approximately as much as 57 Ibs. of tankage plus 

 25 Ibs. of corn. From this, one can readily determine the value of 

 linseed meal with feeds at local prices. For instance, with corn and 

 tankage at the prices just stated, linseed meal thus fed would be worth 

 about $39 a ton. On poor pasture, such as blue grass in midsummer, 

 linseed meal does not give such good results as the only supplement to 



grain. 92 



Linseed meal vs. tankage as supplement to corn for pigs 



Daily Feed for 100 Ibs. gain 



Corn Supplem 

 Lba. Lba. 



. 



Average ration gain Corn Supplement 



Lbs. 



Young pigs in dry lot* 



I. Linseed meal, 0.61 Ib. Corn, 4.0 Ibs .......... 1 . 02 398 61 



II. Tankage, 0.43 Ib. Corn, 4.7 Ibs .......... 1.31 360 33 



Well-grown pigs in dry lot\ 



I. Linseed meal, 0.69 Ib. Corn, 5.3 Ibs .......... 1 . 46 374 46 



//. Tankage, 0.38 Ib. Corn, 5.8 Ibs .......... 1 . 50 399 25 



Young pigs on good pasture^ 



I. Linseed meal, 0.48 Ib. Corn, 4.7 Ibs .......... 1.34 359 35 



//. Tankage, 0.30 Ib. Corn, 5.0 Ibs .......... 1 . 42 354 21 



*Average of 7 trials by Robison (Ohio Bui. 349 and information to the authors) ; 2 by McCampbell, 

 Ferrin, and Winchester (Kan. Cir. 78) ; and 2 by Morrison and Bohstedt, Wis. Station (Unpublished data). 



tAverage of 4 trials by Skinner and Cochel (Ind. Buls. 126 and 137); 2 by Forbes (Ohio Bui. 213); 2 by 

 Snyder (Nebr. Bui. 147); 1 by Hays (Del. Bui. 124); and 1 by Robison (Ohio Bui. 316). 



tAverage of 3 trials by Morrison, Bohstedt, and Fargo (Wis. Bui. 323 and unpublished data); 2 by 

 Grimes (Penn. Bui. 168); and 2 by Robison (Ohio Bui. 349). 



The highest value can not usually be secured from linseed meal when 

 it is used as the only supplement to the grains, even for well-grown pigs 

 or those on pasture. However, when linseed meal is combined with a 

 small amount of tankage or dairy by-products, excellent results are 

 secured. In fact, in each of 3 trials by Morrison, Bohstedt and Fargo at 

 the Wisconsin Station 93 pigs self-fed, free choice, shelled corn and a 

 mixture of half tankage and half linseed meal on good pasture have made 

 more rapid gains than others fed tankage as the supplement. Thus fed, 

 linseed meal has been worth as much as tankage, pound for pound, 

 showing the saving possible thru efficient combinations of feeds. For 

 pigs fed corn in dry lots, a mixture of 1 part linseed meal, 1 part 

 chopped alfalfa hay, and 2 parts tankage has been superior to tankage 

 or to a mixture of only tankage and linseed meal. This is apparently 

 due to the legume hay furnishing some nutritive factor partially deficient 

 in the ration of corn, linseed meal, and tankage. 



Where no animal feeds, like tankage or dairy by-products, are avail- 

 able to feed with linseed meal and grain, better results will usually be 



92 Evvard, Iowa Station, information to the authors. 

 "Wis. Bui. 323, pp. 8-9; unpublished data, 



