1.52 Report of tiik Dkpaktjient of Botany of the 



crop of fruil,but it was thinned so that the trees were not injured 

 by overbearing. The soil is a sandy loam, well drained, and the 

 air drainage is fairlj^ good. The soil has been cultivated every 

 year and no other crop has been grown between the rows except 

 when the trees were small. Last spring the orchard was not 

 plowed until about June 1, and then the soil baked so hard that 

 there w^as much difficulty in pulverizing it again. No manure 

 was applied in the fall of 1900 and none in the spring of 1901. 

 In the early life of the trees the owner thought they grew' too 

 fast and so manure was withheld from them somewhat. 



The intermingling of the other varieties seemed to have no 

 effect upon the Globe. Globe trees standing adjacent to trees 

 of other varieties having a full crop of fruit were quite as much 

 affected as trees standing at a considerable distance from other 

 varieties. 



]n the "little peach" disease the pit is of normal size and 



contains a well developed kernel, whereas in this case the pit is 



abnormally small and contains no kernel or at most only an 



abortive one. Herein lies the most striking difference between 



" little peach " and the effects of imperfect fertilization. Plates 



III and lYshownatural-size photogi-aphs of thirteen peaches, all 



from one tree. Plate IV also shows natural-size photographs of 



the pits from these thirteen fruits. Number one was a normal 



fruit, while the others were undersized as a consequence of 



imperfect fertilization. By comparing the photographs of the 



fruits with the photographs of their pits it will be seen that 



there is an intimate relation between the size of a fruit and 



the size of its pit. Also that the majority of the pits were far 



below the normal size. The latter is also shown in a striking 



manner by the w^eights of the pits as given in the accompanying 



table: 



Table Showixg Weights of Peach Pits. 



Pit No. 1 -weighed.... 6.9G grams. 

 Pit Xo. 2 Aveiglietl. . . . G.24 grams. 

 Pit No. 3 weighed.... 5.05 grams. 

 Pit No. 4 weiglipd. . . . 2.41 grams. 

 Pit No. 5 weighed.... 1.15 grams. 

 Pit No. 6 weighed.... 1.24 grams. 



