CONTENTS. 



CHAPTER SECTIONS PAGE 



I. THE DEVELOPMENT OF SCIENTIFIC AG- 

 RICULTURE i-n 7 



/flj THE ORIGIN, COMPOSITION, AND CLAS- 



SIFICATION OF SOILS i . 1 2-49 12 



III. THE COMPOSITION OF PLANTS . . 50-70 27 



IV. COMPOSITION AND PROPERTIES OF THE 



ATMOSPHERE 71-82 35 



V. THE SOURCES OF PLANT-FOOD, AND HOW 



OBTAINED 83-95 39 



VI. THE IMPROVEMENT OF SOILS . . 96-110 45 

 VII. THE USE OF MANURES OR FERTILIZERS 111-157 51 

 JVJIL, MINERAL FERTILIZERS .... 158-176 70 

 IX. ROTATION OF CROPS .... 177-188 79 

 X. THE SELECTION AND CARE OF LIVE- 

 STOCK 189-200 84 



APPENDIX go 



QUESTIONS 95 



