KXPERIMEXTS IX ORCHARD CULTURE. 



19 



a means of warding off the apple scab fungus. Since this ques- 

 tion was raised other experimenters have pubHshed data bearing 

 upon the subject, but it has been thought best to carry out the 

 work already begun. A comparison of the results here given 

 with those published elsewhere is not without interest. 



In a way, the commercial grading as given on page 18 might 

 be taken as an index of the condition of the fruit on the several 

 plots. In order to get exact percentages, however, four trees, 

 representing, as nearly as possible, the average of the whole, 

 were selected on each plot. From each of these, two and one- 

 half bushels of fruit, taken indiscriminately from all parts of the 

 tree, were carefully graded and counted. The results thus 

 obtained may be regarded as fairly indictive of the character of 

 the fruit on each plot. 



POTASH AND APPLE SCAB. 



Plot. 



o 



be 



u 

 m 



s5 



©' 



Kaixite 



Average . 



Sulphate ... 



Average. 

 Check 



Average. 

 Muriate ... 



Average 



40 

 23 

 13 

 20 



24 



18 

 13 

 30 

 51 



28 



37 

 58 

 52 

 42 



47 



57 

 81 

 42 

 53 



58 



80 

 80 

 76 



88 



81 



88 

 67 

 90 

 99 



85 



97 



100 



98 



96 



98 



99 



100 



99 



99 



99 



As will be seen, the per cent of fruit free from scab increases 

 regularly from the north to the south end of the orchard. The 

 check trees, while producing nearly the same percentage of No. 



