382 



STATE HORTICULTURAL SOCIETY. 



TABLE 7 — Pounds and cost of fertilizer per acre to supply a crop with nitrogen. 



Wheat — 55.65 pounds of nitrogen : 



700 pounds ground lish (8% of nitrogen) 



278 



354 



938 



1391 



1391 



sulpbate of aiuuQonia (20% of nitrogen) 



nitrate of soda (15|% of nitrogen) . 



fine ground bone and tankage (6% of nitrogen) 



tine ground medium bone and tankage (4% of nitrogen) 

 medium bone and tankage (4% of nitrogeuj 



Oats— 32.10 pounds of nitrogen 

 400 pounds ground fish. 



160 

 204 

 535 



802 

 802 



sulphate of ammonia 



nitrate of soda 



tine ground bone and tankage 



tine ground medium bone and tankage, 

 medium bone and tankage 



Corn — 83.70 pounds of nitrogen : 

 1040 pounds ground tisb. 



419 



532 



1395 



2092 



2092 



sulphate of ammonia 



nitrate of soda 



tine ground bone and tankage 



tine ground medium bone and tankage, 

 medium bone and tankage 



Timothy— 47 20 pounds of nitrogen : 

 590 pounds ground tish. 



236 



300 



787 



1180 



1180 



sulphate of ammonia 



nitrate of soda 



tine ground bone and tankage 



fine ground medium bone and tankage, 

 medium bone and tankage 



Potatoes— 24 pounds of nitrogen 

 300 pounds ground tish 



120 

 152 

 400 

 600 



600 



sulphate of ammonia 



nitrate of soda 



tine ground bone and tankage. . . 

 fine medium bone and tankage, 

 medium bone and tankage , 



Cabbage— 64 8 pounds of nitrogen: 

 810 pounds ground ti>>h. 



324 



412 ' 



1080 ' 



1620 ' 



1620 ' 



sulphate of ammonia 



?ntrate of soda 



fine ground bone and tankage 



fine ground medium bone and tankage, 

 medium bone and tankage 



$9 74 

 9 46 

 8 63 

 8 35 

 6 68 

 3 89 



62 

 46 

 97 



81 



3 85 

 2 25 



14 65 

 14 23 

 12 97 

 12 55 

 10 44 

 5 86 



8 26 

 8 02 

 32 

 08 

 66 

 30 



4 20 

 4 08 

 3 72 

 3 60 



2 88 

 1 68 



11 34 



11 02 



10 04 



9 72 



7 78 



4 54 



GREEN MANURING. 



It is proper here to explain the principles of green manuring, since 

 they bear in an important manner upon the nitrogen question, and are 

 in explanation of some of the statements just made ; the practice itself 

 is old, and has been followed with varying degrees of success for hun- 

 dreds of years. To incorporate great masses of vegetable matter into 

 a soil increases its water-holding power, makes it more porous and 

 richer in humus, and imparts to it certain physical properties which are 

 highly beneficial to plant life and the growth of crops ; but the quantity 

 of mineral matter in it is thereby not in the least affected ; whatever 



