678 FEEDS AND FEEDING 



equal to 100 Ibs. of mixed grain, and in trials by Fjeldsted and Potter 

 in Oregon 153 it required 422 Ibs. cooked potatoes to replace 100 Ibs. of 

 barley. Averaging together the results at these different stations, we 

 may conclude that it will require about 420 Ibs. of potatoes, fed after 

 cooking, to equal 100 Ibs. of corn or barley in feeding value. For the 

 best results, the proportion of potatoes should not be greater than 4 Ibs. 

 of potatoes to 1 of concentrates. At the Oregon Station 154 Potter found 

 potatoes fed raw were worth only about two-thirds as much per 100 Ibs. 

 as when fed after being cooked. 



Potato silage, made by crushing potatoes with a special machine and 

 adding 2 per ct. of corn meal to inoculate the silage with lactic acid 

 bacteria, w r as worth less than half as much per 100 Ibs. as cooked potatoes 

 in a trial by Morrison and Bohstedt at the Wisconsin Station. 155 



1002. Artichokes. Altho artichokes have long been grown in a small 

 way and have often been extolled as a crop for pigs, their use by feeders 

 does not seem to increase. Apparently this shows that they cannot 

 compete with other crops. In trials at the Iowa Station Evvard 156 found 

 artichokes less valuable than other forage crops. French of the Oregon 

 Station 157 placed pigs in a field of artichokes, estimated to yield 740 bu. 

 per acre. As the pigs made little gain on the tubers alone, a small allow- 

 ance of mixed wheat and oats was supplied in addition, about 310 Ibs. 

 of mixed grain being then required to produce 100 Ibs. of gain. In this 

 case the artichokes saved from 150 to 200 Ibs. of grain for each 100 Ibs. 

 of gain made. 



1003. Pumpkins; squashes Rommel, 158 summarizing the findings of 

 3 stations, reports that 273 Ibs. of grain, together with 376 Ibs. of raw 

 pumpkins, gave 100 Ibs. of gain with fattening pigs. When cooked it 

 required 1,150 Ibs. of pumpkins and 222 of grain for 100 Ibs. of gain. 

 From these data we may conclude that cooking is of no advantage with 

 this vegetable. As has been pointed out before (383), the seeds should 

 not be removed before feeding pumpkins, as they are rich in nutrients. 

 Feeding an undue allowance of seeds would, however, tend to cause di- 

 gestive disturbance, on account of their richness. 



Cottrell 159 states that some Colorado stockmen have fattened hogs 

 exclusively on raw squashes. They report favorable returns per acre, 

 with meat of good flavor but having an undesirable yellow color. 



1004. Sweet potatoes. Dodson of the Louisiana Station 160 recommends 

 sweet potatoes as the best root crop for pigs for fall and early winter 

 grazing on the cut-over pine lands of the South. Sweet potatoes planted 

 in June and early July are ready for feeding by the middle of October. 



153 Ore. Bui. 165. 15 "Colo. Bui. 146. 



"'Breeder's Gaz., 63, 1913, p. 896. 160 La. Bui. 124. 



155 Unpublished data. 



156 Information to the authors. 



157 Ore. Bui. 54. 



158 U. S. Dept. Agr., Bur. Anim. Indus., Bui. 47. 



