TABLE or CONTENTS 



CHAPTER I 



INTRODUCTION 



:c. 



[. What conception should a gardener form of a vegetable or- 

 ganism ? 



2. What are the functions of the various organs of a plant ? . 



CHAPTER II 



THE STRUCTURE OF THE ROOT 



3. What is the structure of the al)sorptive organ, the root 'I- . 

 (re.) The absorj)tive portion of the root. 



(b.) The root-tip 



(c.) The conducting portion of the root 



{(I.) The process of conduction .... 



CHAPTER Til 

 THE NUTRITION OF THE ROOT 



4. What substances must be present in the soil for the continuous 



and effective nutrition of plants 1 . . . . . .30 



5. What is the effect of the various nutritive substances on the 



plant, and in what form do they enter it ? . . . .31 



6. What part is played by the subsidiary nutritive substances and 



the occasional admixtures to the nutritive salts '? . . -35 



7. In what form does the I'oot find the nutritive substances in the 



soil? 39 



(a.) Potassium 41 



(6.) Phosphoric acid 42 



{(-.) Nitrogen 42 



