INDEX 



321 



of fig, 202, 203 



of strawberries, caution regard- 

 ing, 208 



Pollinizers, commercial consider- 

 ation in choosing, 176-177 

 Pome tribe, 180 

 Pomegranate, a semi-tropical fruit, 



204 



Pomelo, history and geography of, 

 200 



in California and Florida, 200 

 Potash, 132 



Potassium, availability of, 133 

 Potato, classification of, botani- 

 cally, 6 



diseases, 97 



fertilization of, 97 



Irish, 95-98 



origin of, 95 



planting, 96 



-scab, 253 



statistics concerning, 96 



sweet, 98 



Potentilla tribe, 180 

 Precooling, 270 



Predaceous insects, illustrated, 239 

 Prince Edward Island, plums grown 



in, 187 



Problems in irrigation, 157 

 Products, value of in irrigated por- 

 tions of United States, 144 

 Project, citrus, exercise, 205 



deciduous fruit, exercise, 195 



diseases affecting, 259 



exercise, fertilization and polli- 

 nization, 179 



study of, 52 



study of landscape, exercise, 310 



vegetable, 116 



Prologs of measuring worm, 233 

 Propagating oven, described and 



illustrated, 66 

 Propagation, asexual. 53, 69 



by seeds, 39 



of blackberry, 55 



of grape, 216 



of olive, 201 



Protoplasm, description of, 17, 18 

 Prune, defined, 187 

 Prunes, drying of, 294, 188 

 Pruning in relation to marketing, 261 



of blackberries, 210 



of currants, 212 



of fruit-trees, 134-137 



of gooseberry, 212 



of grapes, 217 



of raspberry, 212 



of young tree, 127 



-saw, illustrated, 136-137 



-shears, illustrated, 137-138 



tools, 136 



-tools as carriers of pear-blight, 250 



trees, exercise, 140 



young trees, 134-135 

 Prunus as stock and cion, 70 

 Prussic acid, a by-product, 291 

 Pumpkins, 115 



germination of, 42 

 Pupal stage of insect, 225 

 Pure cultures in vinegar manu- 

 facture, 291 

 Pyrus, grafts of on Cydonia, 70 



Q 

 Quince, 184 



Quincunx system of orchard plant- 

 ing, 124 



R 

 Radish, 98 



Raffia used in budding, 74 

 Railroad in relation to fruit in- 

 dustry, 267 

 Raisins, drying of, 294 



history of, 220 



method of curing, 221 



-seed meal, a by-product, 291 

 Raspberry, 212 



propagation of, 55, 59 

 Recent irrigation, 143 

 Recessive characters, 9 

 Reclamation service, 143 

 Red-humped caterpillar, control of, 

 233 



exercise, 244 



