138 DESCRIPTION OF FEEDING STUFFS 
than oats, and, pound for pound, as valuable as a feed for horses.” 
Experience from abroad suggests a fruitful line of experimentation 
for American feed manufacturers with this product, as there can be 
no question but that our potato industry can be readily further 
developed, and that it would be of great benefit to potato growers as 
well as to feeders to have cull or other potatoes made into a feed of 
unquestioned merit which can be kept indefinitely. 
Miscellaneous Succulent Feeds.—A number of miscellaneous 
succulent feeds of minor importance for stock feeding, like cabbage, 
rape, kale, pumpkins, etc., may be conveniently considered at this 
time. 
Cabbage (Brassica oleracea) is a favorite feed among many 
sheep men, especially for fitting sheep for shows. It is also occa- 
sionally fed to milch cows and laying hens. On account of the 
relatively small yields obtained and the expense of growing cab- 
bages, it will not pay to use them for stock feeding, except in the 
case of unfavorable market conditions, or where the cost of the 
feed is not an important factor, as in the case of feeding for ex- 
hibition stock or preparing cows for official tests. As with other 
plants of the mustard family, cabbages are likely to taint the milk 
when fed to dairy cows and should, therefore, be fed after the 
milk has been removed from the stable. Cabbages contain, on the 
average, less than 10 per cent solids, 2.6 per cent digestible protein, 
and 6.1 per cent digestible carbohydrates and fat, the nutritive 
ratio being 1:2.7. A considerable proportion (30 per cent or 
more) of the protein is, however, present in amide form, in this 
as in other green plants, making it less valuable as a source of 
protein than is indicated by its narrow nutritive ratio. Trials con- 
ducted at the Cornell station showed that on the average for three 
years cabbages yielded 22.5 to 43.8 tons to the acre, containing 
1.8 to 3.1 tons of dry matter (average dry matter content, 6.3 to 7.1 
per cent).* 
Rape (Brassica napus) is a valuable forage crop, especially 
adapted to a relatively cool and moist climate. It does well in 
northern United States and Canada, but can also be successfully 
grown further south and in the semi-arid sections of the country, 
either with or without irrigation. The parts of the plant eaten by 
stock are the numerous leaves and fleshy stems. Rape is used 
either for pasturage or as a soiling crop for sheep and swine, 
generally the former, while it is cut and fed green to cattle. It 
may be sown broadcast in the early spring and later at intervals of 
* Bulletin 242, 
