COMPARATIVE VALUES OF TURNIPS AND MANGOLDS. 453 



the standard for the comparison, we should find the follow- 

 ing arrangement would represent their relative feeding 

 properties : 



Relative Values. Feeding Equivalents. 



Turnips, I'OO or 100 Ibs. 



Long Red Mangold, 1'21 82,, 



Yellow Globe 1'37 ,, 72 



Long Yellow , 1'49 67,, 



Mangold average, 1'35 . ,, 74 ,, 



In the first column we have the relative value of the 

 mangolds as compared with the turnip, and in the second 

 these are reduced, for practical application, to their equiva- 

 lents in Ibs. weight. For instance, we find that the rela- 

 tive value of Long Yellow mangold is nearly half as much 

 again as that of the turnip; consequently, that 67. Ibs. of 

 the former are equivalent in feeding properties to 100 Ibs. 

 of the latter. 



These data are strictly comparative so far as their theo- 

 retical values are concerned, and no doubt fairly represent 

 that the actual feeding properties of mangold are superior 

 to those of the turnip, though, owing to the difficulty of 

 carrying on a feeding experiment with the two roots 

 under conditions equally suitable to both, the results 

 might not be quite in accordance with the equivalents 

 given. It is well known that the mangold, when given in 

 a fresh state to cattle, is very apt to purge them, and thus 

 lower their condition; whereas, by storing it for a certain 

 time the peculiar acrid substance which it contains under- 

 goes a change, and no longer acts in that manner upon 

 the economy of the animal. Experience has shown us, 

 therefore, that in order to obtain the best effect from 

 mangolds, they should not be given to stock until they 

 have remained (say three or four months) in the store* 

 heap; whereas the turnips rather deteriorate by keeping, 

 and exhibit their highest values when given in a fresh 

 state. Thus, were their relative feeding values tested by 



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