New York Agricultural Experiment Station. 225 



SUMMARY OF EESULTS OBTAINED IN THE TEIT- 



YEAR EXPERIMENTS. 



The following table shows the results obtained in the ten-year 

 experiments at Geneva and Riverhead : 



Table XXIII. — Summary of the Ten-Year Experiments. 



The ten-year experiments are now concluded. They have been 

 carried out during ten consecutive years very nearly as planned. 

 Three times (twice at Geneva and once at Riverhead) it has been 

 necessary to reject the data from certain parts of the experiment 

 field because of inequalities due to other causes than spraying; 

 but there has been no crop failure or serious accident to break the 

 continuity of the experiments. 



One striking feature of Table XXIII is the difference between 

 the gains obtained at Geneva and those obtained at Riverhead. 

 At Geneva, the increase in yield due to spraying is more than 

 double what it is at Riverhead. It is probable that this differ- 

 ence is due partly to differences in the temperature and rainfall 

 in the two localities and partly to difference in soil. Through- 

 out the whole ten years the Riverhead experiment has been on 

 light, sandy soil while the experiment at Geneva has been on 

 rather heavy clay loam. 



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