CONTENTS. 



CHAPTER PAGB 



I. The Constituents of Plants 1 



II. Oeigin and Formation of Soils 18 



III. Composition of Soils 29 



IV. The Improvement of Soils 41 



V. Natural Manures . 52 



VI. Artificial and Concentrated Manures ; Ni- 

 trogenous Materials 68 



VII. Artificial and Concentrated Manures ; Phos- 

 phates 80 



VIII. Artificial and Concentrated Manures ; Su- 

 perphosphates and Potash Salts .... 90 



IX. Artificial Manures or Fertilizers ; Methods 



OF Buying ; Valuation ; Formulas .... 101 



X. The Kotation of Crops 113 



XI. The Selection of Seed ; Farm Crops and 

 Their Classification ; Cereals ; Grasses ; 

 Pastures ; Koots ; Tubers ; and Market- 

 Garden Crops 122 



XII. The Growth of Animals ; The Constituents of 

 Animals and Animal Food ; The Charac- 

 ter and Composition of Fodders and Feeds, 137 

 5 



