CONTENTS 



CHAPTER PAGE 



I. THE ELEMENTS OF PLANT FOOD ....09 



Oxygen 14 



Hydrogen 18 



Nitrogen 20 



Carbon 28 



Phosphorus 44 



Potassium 49 



Calcium 52 



Magnesium 55 



Sulphur 56 



Iron 59 



Chlorine .......... 61 



Sodium .......... 63 



Aluminium ......... 65 



Silicon 66 



II. SOILS AND FERTILIZERS 68 



Soil 68 



Drainage .86 



Irrigation 90 



Dry Fanning 95 



Soil Fertility 98 



III. AGRICULTURAL BOTANY 118 



IV. ECONOMIC PLANTS 182 



Cereals 182 



Sugar Plants 213 



Oil Plants 218 



Fiber Plants . . . ... . . . 218 



Grasses 224 



Vegetables and Fruits . 232 



