vi Contents 



PAGES 



The Need of Artificial Fertilizers The cost of pro- 

 duction to a unit of income is increased A greater de- 

 mand for special crops Farm manures are inadequate 



The growing importance of fruit-growing . . . 28-33 

 Will it Pay to Use Fertilizers f 33-36 



CHAPTER III 



NITROGENOUS FERTILIZERS 36-60 



What is Meant by Form of Nitrogen ? . . . 36-37 



Dried Blood 37-39 



Dried Meat or Meal, Azotin, Ammonite, or Animal 



Matter 39 



Dried and Ground Fish, or Fish Guano . . . 39-40 



Tankage 40-41 



Garbage Tankage 42 



Low-grade Nitrogenous Products Horn meal or 



ground horn Leather meal Wool and hair waste . 42-43 

 Vegetable Nitrogenous Products Cottonseed meal 



Linseed meal Castor pomace Vegetable pomaces 43-44 

 Natural Guanos Mechanical Condition should be 



considered 44-47 



Ammonia Compounds Sulfate of ammonia Cal- 

 cium cyanamid ........ 4760 



Nitrate Nitrogen Nitrate of soda Calcium nitrate 



Potassium nitrate Ammonium nitrate . . . 60-63 

 The Relative Availability of the Different Forms of 



Nitrogen Comparative availability of different nitrog- 

 enous substances Conditions which modify avail- 

 ability 63-60 



CHAPTER IV 



PHOSPHATES THEIR SOURCES, COMPOSITION, AND RELA- 

 TIVE VALUE . 61-80 



Phosphate of Lime, or Bone Phosphate Animal 

 Bone Raw bone Fine bone Boiled and steamed 

 bone Commercial grades of bone Bone tankage 

 Other organic products Bone-black, or animal char- 

 coal Bone-ash 62-68 



