CONTENTS 



PAGE 



Acknowledgments. v 



List of Illustrations xi 



Introduction xix 



SECTION I— SOILS 



CHAPTER 



I. The Origin of the Soil 1 



II. The Make-up of the Soil . . . . . 9 



III. Physical Properties of Soils .... 15 



IV. Drainage and Irrigation 24 



V. Handling the Soil 34 



VI. Farm Manures ....... 49 



VII. Commercial Fertilizers 55 



SECTION II— FARM CROPS 



VIII. Classification op Farm Crops .... 64 



IX. Corn 67 



X. Wheat 80 



XI. Other Cereals 88 



XII. Roots, Tubers, Bulbs 96 



XIII. Forage Crops .105 



XIV. Other Farm Crops 121 



XV. Seed Selection 129 



XVI. Rotations 133 



vii 



