10 CONTENTS 



PART IV MISCELLANEOUS CROPS 

 CHAPTER XXII 



Root and Tuber Food Crops. The Potato: Importance, Soils 

 and Fertilizers, Production, Marketing, Improvement. The Sweet 

 Potato: Description, Importance, Method of Production. 



CHAPTER XXIII 



Sugar Plants. The Sugar Beet: Importance, Culture, Manu- 

 facture of Sugar, By-Products. Sugar Cane: Characteristics, Propa- 

 gation, Soils, Production, Making the Sugar. 



CHAPTER XXIV 



Fiber Plants. Cotton: Description, Varieties, Importance, Pro- 

 duction, Soils and Fertilizers, Crop Management, Marketing, Insects 

 and Diseases. Flax. Hemp. 



CHAPTER XXV 



Tobacco. Characteristics. Production. Soils and Fertilizers. 

 Crop Management, Curing and Marketing. 



PART V CONCLUDING CHAPTERS 



CHAPTER XXVI 



Rotation of Crops. Advantages. Effect on Physical Condition of 

 Soil. Keeping down Weeds. Effect on Crop Yields. Distribution 

 of Farm Labor. Relation to Soil Fertility. Classes of Crops. What 

 Crops to Grow. Application of Manure. Rotations for Different 

 Sections. 



CHAPTER XXVII 



Weeds. Classes of Weeds. Damage from Weeds. Benefits from 

 Weeds. How Weeds Spread. Methods of Eradication. 



