CONTENTS. 



Chapter Page 



I. Plant Food and Gbowth 21 



II. Soils — Classification, Composition, Ori- 

 gin, Uses 30 



III. Soils — Physical Properties .... 39 



IV. Soils — Improvement by Manuring. . . 49 

 V. Soils— Improvement by Drainage and 



Irrigation 60 



VI. Tillage — Objects and Methods ... 72 

 VII. Rotation of Crops — Reasons for; Illus- 

 trative Examples 83 



VIII. Farm Crops —Classification, Reasons 



FOR Choice; Improvement .... 94 

 IX. Wheat — History, Production, , Uses, 



Structure, Composition 102 



X. Wheat — Relations to Climate, Soils, 



Manures . * 112 



XI. Wheat — Varieties, Culture, Harvest, 



Diseases 122 



XII. Corn —History, Uses, Structure, Com- 

 position 135 



XIII. Corn — Varieties, Climate, Soils, Ma- 

 nures 147 



