CARROTS, MANGOLDS AND SUGAR BEETS. 



57 



one of Albuminoids to eight of Carbohydrates ; for oxen at 

 work and cows in milk, one of Albuminoids to from four to 

 six of Carbohydrates. 



The following table taken from Prof. Johnson's excellent 

 work, "How Crops Grow," gives the proportion of the Albu- 

 minoids, Carbohydrates and other elements in roots and 

 tubers. 



To give the tables necessary to develop this interesting 

 subject to its full capacity, would be altogether beyond the 

 scope of my little treatise. I will refer my readers to the 

 appendix of that excellent work by Prof. Johnson, "How 

 Crops Grow." 



THE COST OF THE CROP. 



An average crop of Mangolds ma}- be set down at 22 

 tons. To grow this crop would cost the farmer who depends 

 on barn manure mainly, about as follows : — 



