6 CONTENTS. 



CHAPTER VIII. 

 Further Improvement of the Soil, 62 



CHAPTER IX. 



Improvement of the Soil by animal and Vegetable 

 Manures, 66 



CHAPTER X. • 



Improvement by Mineral Manures, 78 



CHAPTER XI. 

 Improvement by Draining, 92 



CHAPTER XII. 

 Operations of Draining, 98 



CHAPTER XIII. 

 Principles of Tillage, 112 



CHAPTER XIV 



Operations of Tillage, 124 



§ 1. The Plough, 124 



^2. Rules for Ploughmen, 141 



^3. The Harrow, 144 



^4. The Roller, 148 



^5. The Cultivator, 150 



§ 6. The Drill Barrow, 151 



CHAPTER XV. 



Alternation of Crops, 152 



CHAPTER XVI. 

 Root Culture, 163 



CHAPTER XVII. 



On substituting Fallow Crops for naked Fallows, . 169 



CHAPTER XVIII. 



On the Adaptation of particular Crops to certain Soils, 182 



CHAPTER XIX. 

 Effects of Cropping and Manuring, 186 



