1260 



EAELE V. HARDENBURG 



TABLE 86. RELATION OF NUMBER OP TIMES SPRAYED WITH FUNGICIDE, AND VALUE OP 

 MANURE AND FERTILIZER, TO YIELD, ON 109 LONG ISLAND FARMS IN 1912 



and fertilizer, respectively, are separated. It appears from table 85 that 

 the yield increased directly with the frequency of spraying, irrespective 

 of the rate of planting. In table 86, the influence of frequency of spraying 

 does not appear to have been so marked. This is due partly, however, 

 to the insufficient number of growers in some of the groups. As a whole, 

 these data indicate that the growers who sprayed the greatest number of 

 times, obtained at least enough increase in yield to pay the extra cost 

 of the labor and materials involved. The correlation of frequency of 

 bordeaux spraying with yield is further shown in figure 149. The coeffi- 



Yield per acre, in bushels 



rH T I i I i I C^ C^ 

 CO i-H CO ' I CO T I 

 ^ 2 SH i2 ^H ^ 



IO O 



t^ ^i 



C^ CO 



T I CO ' I 



oq c^ co 



'- o 



0,-pH 



1 



10 







11 6 



3 1 



FIG. 149. 



5 2 16 18 27 11 

 r = 0.133 0.065 



CORRELATION OF FREQUENCY OF BORDEAUX SPRAYING, AND YIELD, ON 105 LOI 

 ISLAND FARMS IN 1912 



