The Composition and Use of Fertilizers. 



301 



Suggestions. — For early tomatoes apply the above mixture 

 previous to, or at the time of, setting plants. Three or four weeks 

 later apply 100 pounds per acre of nitrate of soda, distributing 

 around the hill. To make sure of even distribution this may be 

 diluted with earth, land plaster, sifted coal ashes or similar 

 material. 



Turnips. 



Same as for beets grown for fodder. 



Watermelons. 



Same as for cucumbers. 



Wheat. 



Per Pounds for 

 cent, one acre. 



Pounds of different materials for one 

 acre. 



Nitrogen . . . ...... 



Available phosphoric 



acid 



Potash 



12 to 24 



7 20 to 40 

 4 12 to 24 



50 to 100 pounds nitrate of soda; 

 50 to 100 pounds dried blood. 



150 to 300 pounds dissolved rock. 

 25 to 50 pounds muriate of potash. 



PAKT IV. 



THE ARITHMETIC OF FERTILIZERS. 



"When we desire to know the amount of nitrogen, potash and 

 phosphoric acid contained in different forms and materials, or to 

 make up formulas from materials of known composition, or to 

 determine the commercial value of any single material or of any 

 mixture, it is necessary to go through various mathematical proc- 

 esses, most of which are comparatively simple and easily under- 

 stood. So many inquiries are made about questions involving 

 simple calculations, that it is thought advisable to present a some- 

 what systematic consideration of some of the more common prob- 

 lems met with. Some calculations, which it might be desirable 

 to use at times, involve more knowledge of chemistry than can be 

 given in a simple treatise of this kind. 



