INDEX 



377 



Pollen, tube-growth, 286, 290 



viability, 287 

 Pollination investigations, 282 

 Pome, 48 



Potash, 191, 199, 208,211 

 Poultry in the orchard, 62 

 Powell, G. H., 321 



quoted, 122, 123, 358, 363, 364, 

 367 

 Power, F. R., quoted, 6 

 Precautions relative to mulched 



trees, 147 

 Pre-cooling, 367 



methods of, 368 

 Price W. A., mentioned, 93 

 Production of nuilch material, 147 

 Protection of trees in winter, 276 

 Proteranflrous, 292 

 Proterogynous, 292 

 Pruning, 63 



and winter injury, 275 



definition, 75 



frozen trees, 94 



mature trees, 97 



objects of, 75 



relation to nutrition, 88 



root-, 63 



summer-, 63 



tree at planting time, 95 



young trees, 96 

 Prunus americaiia, 304, 305, 340, 

 345 



anguslifolia, 345 



avium, 340, 345 



Besscyi, 329, 345 



cerasifera, 340, 345 



Cerasus, 301 



domestica, 32, 340, 345 



horlulana, 42 



Mahaleb, 340, 345 



Munsoniana, 329, 345 



pennsylvanica, 340 



pumiln, 345 



salicina, 32, 304, 329 



serotina, 43 



Prunus, virginiana, 44 

 Purpose of tillage, 173 

 Pyramidal formed tree, 77, 78 

 Pijrus baccata, 327, 328 



hdulcpfolia, 338 



Calleryana, 338 



communis, 42, 338, 344 



Malus, 42, 288, 327, 328, 341 



ovoidea, 337 



Pashia, (variolosa) 337 



prunifolia, 327 



serotina, 344 



sinensis, 337, 338 



Quality in apples, 7 



of fruit improved by thinning, 

 109 

 Quarantine against stocks, 346 

 Quince stocks, 340, 344 



Rainfall 221, 231, 233 

 Ralston, G. S., mentioned, 176 

 Rapid fall of temperature, 268 

 Rate of freezing, 267 

 Receptive condition of stigma, 



289 

 Regular bearing, 1 1 1 



effect of fertilizers on, 215 

 Reimer, F. C, 337 



quoted, 189 

 Relation between blooming and 

 ripening, 251 



of air to soil temperature, 138 



of cion and stock, 349 



of leaf area to flowering, 59 



of stock and cion, 339 

 Relative fertility needs of fruit- 

 trees and farm crops, 183 

 Renovation pruning, 98 

 Reserve food, 53 



Response of young trees to prun- 

 ing, 86 

 Rest period, 240, 262 

 Ringing, 64 



explanation of effects of, 65 



