CONTENTS X vii 



PAGE 

 Diseases of Plants 248 



Bacterial Diseases, p. 248; An Example of a Bacterial Disease, 



p. 249. 



Fungous Diseases, p. 250; Characteristics of Fungi, p. 250; 

 An Example of a Fungous Disease, p. 252; Other Fungous 

 Diseases, p. 253. 

 Parasitic Flowering Plants, p. 254. 



Insects 255 



Importance of Insects, p. 255; What an Insect Is, p. 255; 

 Stages in the Life of an Insect, p. 256; The Control of In- 

 sects, p. 258; Chewing and Sucking Insects, p. 259. 



Spraying for the Control of Insects and Diseases 260 



Common Fungicides and Insecticides, p. 260; Spraying 

 for Fungi, p. 261; The Preparation of Bordeaux Mixture, 

 p. 263; Poisons, p. 264; Contact Remedies, p. 264; Com- 

 bined Insecticides and Fungicides, p. 265. 



Questions 266 



Laboratory Exercises 267 



Collateral Reading 270 



CHAPTER IX 



SYSTEMS OF CROPPING 272-280 



The Choice of Crops, p. 272; The Rotation of Crops, p. 273; Crop- 

 Rotation and Diversified Crops, p. 273; Advantages of 

 Crop-Rotation, p. 274; Profits from Rotation, p. 277; Crop- 

 Rotation and Crop Failure, p. 277; Variation of Crop 

 Areas, p. 278; Examples of Rotations, p. 278. 



Questions 280 



Laboratory Exercises 280 



Collateral Reading 280 



CHAPTER X 



FEEDS AND FEEDING 281-300 



Importance of Animal Food and Work 281 



Composition of Feeds 282 



Water, p. 282; Ash, p. 283; Protein, p. 283; Ether Extract 



