X TABLE OF CONTENTS 



PAGES 



172. Experiments in Tilled Orchards: The Woburn experi- 

 ment, 173; The New York experiments, 174; The New 

 Hampshire experiments, 175; The Maine experiment, 176; 

 The Oregon experiments, 177; West Virgmia experiment, 

 178; The Pennsylvania experiments, 179; The Ohio ex- 

 periments, ISO; Results compared, 181. Other Results of 

 Fertilizing: Color of fruit, 182; FertiHzing the peach, 183; 

 Effect of fertihzing on regular bearing, 184; AppHcation of 

 fertihzers, 185; Size of fruit, 186; Summary, 187. 



CHAPTER X 



The Relation of Climate to Pomology 218-253 



Terms defined, 188; Rekition of weather to the fruit 

 crops, 189; Temperature, 190; Rainfall, 191; Spring frosts, 

 192; Winds, 193; Sunshine, 194; Hail, 195; Continental 

 versus marine climates, 196; Mountain versus valley cli- 

 mates, 197; Climate of United States, 198; Climatic prov- 

 inces of the United States, 199; The Eastern province, 

 200; The Gulf province, 201; The Plains province, 202; 

 The Plateau province, 203; The Pacific province, 204; 

 Natural guides to horticultural practices, 205; Bioclimatic 

 law of latitude, longitude, and altitude, 206; Species 

 adaptation, 207; Temperatures which injure setting of 

 fruits, 208; Averting injury from frosts and freezes, 209; 

 Effect of climate on the floral structure, 210; The effect of 

 climate on development of fruit, 211; Climatic factors 

 which delimit the geographical distribution of fruits, 212; 

 Specific requirements for certain varieties, 213. Pheno- 

 logical Studies: The physiological constant, 214; The 

 blooming season, 215; Comparative blooming dates, 216; 

 Duration of blooming period, 217; Period of ripening of 

 hardy fruits, 218; Relation between blooming and ripen- 

 ing, 219; Form for recording phenological data, 220. 



CHAPTER XI 



Winter Injury 254-281 



Bud injury, 221; Injury to the woody parts above 

 ground, 222; The killing of the terminals, 223; Killing of 

 patches, 224; Crotch injury, 225; Collar-rot, 226; Frost- 

 cracks, 227; "Black heart," 228; Sun-scald, 229; Root- 

 kiUing, 230; How freezing kills, 231; Hardiness of different 

 tissues, 232; Rest-period, 233. Factors Involved in Freezing: 



