CONTENTS XV 



SECTION VI 

 Propagation 



CHAPTER XXXI 



Paqb 



The Reciprocal Influences of Stock and Cion 552 



The Congeniality of Grafts — Congeniality and Adaptability Distinguished — 

 The Influence of Stock on Cion — Stature; P^orm — Seasonal Changes — End- 

 season Effects, Ripening of Fruit; Maturity of Wood; Spring Effects — Hardi- 

 ness — Disease Resistance — Physiological Diseases — Yield — Fruit-bud Form- 

 ation; Fruit Setting; Size of Fruit — Quality — In Pomaceous Fruits; In 

 Stone Fruits; in Grapes; Qualitative Differences and Quantitative Varia- 

 tions — Longevity; General Influence of Stock on Cion — Influence of Cion 

 on Stock — Size and Number of Roots; Distribution and Character of Roots; 

 Longevity, Growing Season and Hardiness; Other Influences; in General. 



CHAPTER XXXII 



The Root Systems of Fruit Plants 584 



Conflicting Interests of Nurseryman and Fruit Grower — Adaptation of Stocks 

 to Particular Conditions — Adaptation to Soil Temperatures; Adaptation to 

 Soil Texture and Composition; Immunity or Resistance to Soil Parasites — 

 Propagation by Cuttings — Advantages and Disadvantages — Grapes in 

 Particular; Apples and Pears — Propagating Apples and Pears by Layerage 

 and Hardwood Cuttings — Varietal Differences and Contributing Factors — 

 Sources of Nursery Stock — Grades of Nursery Stock — Selection of Seedling 

 Stocks; Grafted or Budded Trees; Double Worked Trees — Pedigreed Trees — 

 Some Results in Citrus Fruits; Some Results in Apples; in GeneraL 



SECTION vn 



Geographic Influences in Fruit Production 

 CHAPTER XXXIII 



The Geography of Fruit Growing 612 



Life Zones, Crop Zones and Fruit Zones — The Boreal Zone; the Tropical 

 Zone — Austral or Temperate Zone — Transition Zone; Upper Austral Zone; 

 Lower Austral or Sub-tropic Zone — Geography of Fruit Production as Influ- 

 enced by Temperature — Peach Growing as Influenced by Temperature; 

 Grape Growing as Influenced by Temperature; Temperature and the 

 Geographic Range of Apple Varieties; the Effect of Bodies of Water on 

 Temperature; Influence of Altitude on Air and Soil Temperatures — 

 Geography of Fruit Production as Influenced by Rainfall and Humidity — 

 Other Factors Influencing the Geographic Distribution of Fruits — Sunshine; 

 Parasites; Wind; Native Range of Parent Species; Length of Time in Culti- 

 vation; Uses and Quality of Product; Relation to Consuming Centers and 

 Transportation Facilities— Summary. 



