Food for "Jn making these mixtures two important points were 



Plants taken into consideration. First, that the value of a complete 



106 fertilizer depends upon the kind and quality of the essential 



ingredients, Nitrogen, phosphoric acid, and potash contained 



in it; and second, that the higher the grade of the materials 



used in making the mixture the less will be the expenses of 



freight and handling per pound of essential ingredients. 



"High grade materials were used in the preparation of 

 all of these mixtures, and the different combinations were, as 

 a rule, adopted after a careful study of the plant-food re- 

 quirements of the soil for different crops. 



"Chemical analyses were made of all the materials used 

 in the mixtures : 



Formulas. 

 For General Crops: 



Nitrate of Soda 200 Ibs. 



Dried blood 200 ' 



Ground bone 400 ' 



Superphosphate 1,000 ' 



Sulphate of potash 200 ' 



2,000 Ibs. 

 For Potatoes: I. 



Nitrate of Soda 100 Ibs. 



Dried blood 200 " 



Ground fish 2co " 



Ground bone 400 ' 



Superphosphate 800 ' 



High-grade sulphate of potash 300 ' 



2,000 Ibs. 

 II. 



Nitrate of Soda 250 Ibs. 



Tankage 500 " 



Bone-black superphosphate 800 " 



High-grade sulphate of potash 450 " 



2,000 Ibs. 

 III. 



Nitrate of Soda 250 Ibs. 



Sulphate of ammonia 400 " 



Bone-black superphosphate 800 " 



Double sulphate of potash and magnesia 675 " 



Land plaster 500 " 



2,625 !*>. 



