CONTENTS 



PART I 



THE PLANT 



CHAPTER I 

 Germination of the Seed 17 



CHAPTER II 



Growth of the Plant 26 



CHAPTER III 

 Plant Compounds 50 



CHAPTER IV 



Crops 107 



PART II 

 FACTORS IN PLANT GROWTH 



CHAPTER V 

 The Air 131 



CHAPTER VI 



The Soil: Organic Matter 139 



CHAPTER VII 

 The Soil: Inorganic Matter 162 



CHAPTER VIII 



Fertilizers . 19S 



