CONTENTS 



CHAPTER I 



PAGES 



C::-JIlSTORY AND BOTANY I-7 



CHAPTER II 

 Some Conditions Influencing Growth 



AND Development 8-16 



Influence of Light on Yield, 8; Amount of Mois- 

 ture, 8; Respiration, 9; Influence of Tempera- 

 ture on Respiration, 9; Influence of Temperature 

 on Growth, 10; Potato Roots, 10; Influence of 

 Depth of Planting on Roots, 15; Blossoming, 

 Tuber Formation, and Hilling, 16. 



CHAPTER III 

 Soils 17-25 



Best Soils, and Reasons why Certain Soils are 

 Better than Others, 17; Influence of Soil on 

 Different Varieties, ig; Subsoiling, 20; Prepara- 

 tion of the Soil, 21; Surface-fitting Tools, 23. 



CHAPTER IV 

 Rotation 26-29 



CHAPTER V 

 Manuring and Fertilizing 30-50 



Object, 30; Influence of Nitrogen, 31; Influence 

 of Potash, 32; Sources of Potash, 33; Influence 

 of Phosphoric Acid, 34; Influence of Calcium, 35; 

 Barn Manure, 36; Function of Fertilizers, 39; 

 Purchasing and Applying Fertilizers, 42; Value, 

 43; Unit Value, 44, Purchasing, 44; Valuing 

 Barn Manure, 44; Mixing Fertilizers, 46; Ap- 

 plying Fertilizers, 48; Water Requirement, 48. 



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