THE BOG INDUSTRY. 171 
Tli pigs on sweel potatoes ate 26.2 pounds per head daily and made 
an average daily gain of 0.86 pound. They ate 3,247 pounds of sweel 
potatoes for LOO pounds of gain. 
The pigs on corn ate an average of 9.2 pounds of grain daily, and 
made an average daily gain of L.39 pounds, requiring 602 pounds of 
corn for LOO pounds of gaiu. 
It was estimated that, at 200 bushels per acre, sweet potatoes would 
produce 369.5 pounds of pork per acre, worth sis. 47 when pork is 
worth 5 cents per pound. The gain from corn was 139.5 pounds of 
pork, and the corn yield was 15 bushels per acre on land similar to 
thai on which the sweet potatoes were grown. At 5 cents per pound 
tor pork, the money return for the corn was $6.97 per acre. 
The Maryland Station" reports an attempt to maintain pigs exclu- 
sively on sweet potatoes. A lot of rather mature pigs was put on a 
ration of small sweet potatoes and "strings" that were fed raw twice 
a day for thirty-one days. It required over 5 tons of these potatoes 
for 100 pounds of gain, and the return from them was only about $1.60 
per ton. 
The value of this feed when given with grain was tested with a 
younger lot of pigs for thirty days. With this lot, 593 pounds of sweet 
potatoes, 277 pounds of milk, and about 60 pounds of grain were 
required for 100 pounds of gain, and the value per ton of the potatoes 
was estimated at $2.40, showing sweet potatoes to be more valuable 
when fed with grain and milk. 
The Florida Station b fed a lot of 1 native hogs on a ration of equal 
parts by weight of sweet x^otatoes and wheat middlings, the ration 
being 3.5 pounds of each per 100 pounds live weight of hog. They 
were confined in an open pen and fed twice daily. The hogs aver- 
aged 101.5 pounds at the beginning of the test and increased in weight 
31. 1G per cent, or 126.5 pounds, at a cost of 5.6 cents per pound of 
gain for feed eaten. 
At the Alabama Station, Duggar c penned 2 shoats, averaging 116 
pounds, on sweet potatoes for thirty-five days. They were given, in 
addition, 2 pounds of ground corn and 1 pound of ground cowpeas 
per head daily. In the time specified they gained 67 pounds, an aver- 
age daily gain of 0.93 pound, thus requiring 313 pounds of grain in 
addition to the sweet potatoes for each 100 pounds gain. Duggar 
states that the sweet potatoes were not relished greatly and that there 
was much waste of them, due probably to the relatively large amount 
of grain fed. 
Artichokes. — At the Oregon Station ^ French took 6 Berkshire pigs 
from wheat stubble on October 22 and placed them on a field of 
artichokes that had been planted in April on deep-plowed ground, 
prepared, as for potatoes, in rows 3 feet apart, with the seed 18 
inches apart in the row. The growth was vigorous and the yield 
abundant, the tops growing to a height of 7 feet during the season, 
"Bui. No. 68. h Bui. No. 55. 'Bui. No. 122. <i Bui. No. 54. 
