vi CONTENTS 



IV. FARM CROPS page 



Farm Crops: Indian Corn or Maize 195 



Grain Crops: Wheat 209 



Grain Crops: Oats 218 



Forage Crops: Grasses 224 



Forage Crops: Clovers 228 



Forage Crops: Alfalfa 233 



V. SOILS: THEIR ORIGIN, CHARACTERISTICS, 

 AND IMPROVEMENTS 



The Making of the Soil 241 



The Water in the Soil 245 



Soil Fertility 249 



Soil Tillage and Crop Rotation • 253 



The Kinds of Soils 257 



Appendix 261 



Suggestions for the Teacher 263 



