31G Bureau of Farmers' Institutes. 



simply add 33 pounds of sand, land plaster or other inert matter 

 as a " filling," and we thus obtain one ton of a fertilizer having 

 the composition given above. 



By adding one more ton of filling, we should have two tons of a 

 fertilizer of the following composition: 



Per cent. 



Nitrogen 2 



Available phosphoric acid 4 



Potash 5 



PAET V. 



AVEKAGE COMPOSITION AND VALUE OF DIFFER- 

 ENT FERTILIZING MATERIALS AND OF FARM 

 CROPS. TABULATED COMPILATION. 



In the tables following, we present a compilation of data, show- 

 ing the manurial composition and value of a large number of 

 different kinds of materials. The different kinds of materials given 

 are tabulated and presented under the following heads : 



1. Materials used in fertilizers. 



2. Hay and dry coarse fodders. 



3. Green fodders. 



4. Straw, chaff, leaves, etc. 



5. Roots, bulbs, tubers, etc, 



6. Grains and other seeds. 



7. Mill products. 



8. Fruits. 



9. Vegetables. 



10. Dairy products. 



11. Farm animals and animal products. 



12. By-products and waste materials. 



13. Animal manures. 



Tn assigning values to nitrogen, phosphoric acid and potash con- 

 tained in materials not found regularly in the market as fertiliz- 

 ing materials, there is difficulty in fixing a price that will represent 



