Food for Dressing during the growing season, and is the quickest act- 

 Plant8 ing of all the Nitrogenous fertilizers. 



Dried blood, tankage, azotine, fish scrap, castor pomace, 

 and cotton-seed meal represent fertilizers where the Nitro- 

 gen is only slowly available, and they must be applied in the 

 fall so as to be decomposed and available for the following 

 season. Nitrogen in the form of Nitrate of Soda is at 

 once available during the growing and fruiting season, 

 possessing, therefore, a decided advantage over all other 

 Nitrogen plant-foods. 



The following list of materials used as a source of Nitro- 

 gen, in making commercial fertilizers, shows the percentage 

 of Nitrogen in each : 



Per cent. Nitrogen. 



Nitrate of Soda 15 to 16 



Dried Blood 10 to 14 



Tankage 5 to la 



Dried Fish Scrap 9 to n 



Cotton-teed Meal 6 to 7 



Castor Pomace 5 to 6 



Tobacco Stems 2 to 3 



Bone Meal 2 to 4 



Nitrate of Potash 13 to 14 



Manures 0.3 to 1.6 



The following table shows the number of pounds of 

 Nitrogen removed in one year from one acre by the crop 

 specified : 



Crop. Nitrogen. 



Wheat 35 bushels. 59 Ibs. 



Rye 30 bushel*. 51 Ibs. 



Barley 40 bushels. 46 Ibt. 



Oats 60 bushels. 55 Ibs. 



Corn 50 bushels. 67 Ibs. 



Buckwheat 30 bushels. 35 Ibt. 



Potatoes 200 bushels. 46 Ibs. 



Sugar Beets 1554 tons. 69 Ibs. 



Mangel-wurzel 22 tons. 150 Ibs. 



Meadow hay 2^2 tons, dry. 83 Ibs. 



Green corn nj4 tons. 85 Ibs. 



Alfalfa 8 tons. 113 Ibs. 



Hopt 600 Ibs. seed. 84 Ibs. 



Tobacco 1,600 Ibs. 89 Ibs. 



Grapes 2 tons. 32 Ibs. 



Cabbage 31 tons. 150 Ibs. 



Oranges 10 tont. 24 Ibt. 



