CONTENTS 



PART I. AN ACCOUNT OF THE SOIL 



CHAP. PAGE 



I What the plant wants feom the soil ... 1 



II The composition of the soil 13 



III The organic matter of the soil and the changes 



it undergoes 36 



IV The effect of climate on the soil and on fertility 48 



PART II. THE CONTROL OF THE SOIL 



V Cultivation 76 



VI The control of soil fertility 94 



PART III. FERTILISERS 



VII The nitrogenous fertilisers 127 



VIII Phosphates 140 



IX PoTASsic fertilisers 154 



X Manures supplying organic matter: Farmyard 



MANURE 165 



XI Other organic manures 191 



XII The purchase and use of artificial manures . 206 



XIII Chalk, limestone and limb 219 



Appendix 227 



Bibliography ........ 236 



Index 237 



