244 SOILS AND FERTILIZERS 



phate, and mix them as desired. By so doing fertilizers 

 of any composition may be prepared and there is less dan- 

 ger of securing an inferior article. Of course it is not 

 possible by means of shovels and sieves to accomplish as 

 thorough mixing of the ingredients as with machinery. 



W 2 

 O O ftS 



< p a 



h - M 

 2 o 3 



FORMULA No. i 



/ U O Id 



POUNDS POUNDS 



Nitrate of soda . . 500 containing nitrogen . . 77.5 3.87 

 Acid phosphate . . 1200 containing phos. acid . . 168.0 8.40 

 Sulphate of potash . 300 containing potash . . . 150.0 7.50 



Total . . . . ........... 395.5 



FORMULA No. 2 



Nitrate of soda . . 250 containing nitrogen . . 38.7 1.99 

 Acid phosphate . . 900 containing phos. acid . . 126.0 6.30 

 Sulphate of potash . 450 containing potash . . . 225.0 11.50 

 Plaster, etc. . . . 400 



Total ............... 389.7 



FORMULA No. 3 



Nitrate of soda . . 200 containing nitrogen . . 31.0 1.55 



Acid phosphate . . 1500 containing phos. acid . . 210.0 10.50 



Sulphate of potash . 150 containing potash . . . 75.0 5.75 



Plaster, etc. ... 150 



Total ............... 316.0 



292. Fertilizers and Tillage. --Commercial fertilizers 

 cannot be made to take the place of good tillage, which 

 is equally as important when fertilizers are used as when 



