39 



Adams Couxty York Imperials — "Xone Better Grown."' 



THE INFLUENCE OF FERTILIZATION AND OTHER 

 FACTORS UPON YIELD, COLOR, SIZE AND GROWTH 

 IN APPLES. 



Dr. J. P. Stewart, F^xperimcv.tal Pomologist, State College, Pa. 



The Pennsylvania Experiment Station has been conducting 

 experiments bearing upon the above subject, during the past five 

 years. Altogether, it has now in operation i8 such experiments, 

 involving ii soil types and 3660 trees. In many respects, this series 

 of experiments is by far the most comprehensive of any similar 

 series thus far reported in America. In number of soil types ; in 

 the number of treatments and checks ; in number, variety and range 

 of age of the trees ; in duplications of the experiments of a given 

 type; in the amounts of fruit involved; and in the fact that the ex- 

 periments are distributed over the state and located as a rule in 

 regions generally recognized as being well adapted to apple produc- 

 tion — in all these respects we believe that the Pennsylvania orchard 

 experiments enjoy distinct advantages over most previous eft'orts 

 to answer the questions involved. 



