CHAPTEE XIII. 



MISCELLANEOUS FEEDING STUFFS. 



I. Hoots and Tubers. 

 Digestible nutrients and fertilizing constituents. 



314. Yield of root crops. At the Ohio Station, 1 Thome and 

 Hickman, as the result of trials covering twelve years, report 

 that sugar beets gave an average yield of sixteen tons per acre on 

 land which during the same time would yield sixty bushels of 

 shelled corn per acre. They estimate that beets cost two dollars 

 per ton to raise, harvest and place in the cellar. At the Ottawa 

 (Canada) Station, 2 Eobertson reports mangels and carrots yield- 

 ing 13.5 tons per acre, and costing for rent of land, cultivation 

 and storage of the crop two dollars and fifty cents per ton. 



Zavitz, of the Ontario Agricultural College, 3 reports the yields 

 of the three best varieties each of potatoes and roots, under test 

 for five to six years, to be as follows: 



Potatoes, 185 bushels per acre. 

 Carrots, 28 tons per acre. 

 Mangels, 24 tons per acre. 



1 Rept. 9. 



2 Rept. 1892. 

 8 Rept, 1896. 



Turnips ( fall or flat), 23 tons per acre, 

 Swedes ( ruta-bagas),20 tons per acre. 

 Sugar beets, 17 tons per acre. 



