COMMERCIAL FERTILIZERS 215 



phosphate, and mix them as desired. By so doing a 

 fertilizer of any composition may be prepared and 

 there is less danger of securing an inferior article. 

 Of course it is not possible by means of shovels and 

 sieves to accomplish as thorough mixing of the ingre- 

 dients as with machinerv. 



o 



&S. 



•m It 4) 



Formula No. 1. «p.s 



Pounds. Pounds, cl, 8«£ 



Nitrate of soda 500 containing nitrogen 77.5 3.87 



Acid phosphate 1200 containing phos. acid... 16S.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 6.3 



Sulphate of potash . • 450 containing potash 225.0 11.5 



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 



275. Fertilizers and Tillage. — Commercial fer- 

 tilizers cannot be made to take the place of good 

 tillage, which is equally as important when fertilizers 



