TABLE OF CONTENTS 



CHAP TEE I 



INTRODUCTION 



SEC. PAOE 



1. What conception should a gardener form of a vegetahle or- 



ganism? I 



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



CHAPTER II 

 THE STRUCTURE OF THE ROOT 



4 

 7 



10 

 16 



3. What is the structure of the absorptive organ, the root ? . 

 ■'- (a.) The absorptive portion of the root . 



(ft.) The root-tip 



(c.) .The conducting portion of the root 



(d.) 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 ? . . . . . .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 root find the nutritive substances in the 



soil? 39 



(fls.) Potassium 41 



(6.) Phosphoric acid 42 



(c.) Nitrogen 42 



