1907.] PUBLIC DOCUMENT — No. 33. 



35 



planted. On May 14, the balance of tlie field was i^lanted. 

 The crop was carefully cared for throughout the entire sea- 

 son. The vines were repeatedly sprayed with Bordeaux 

 mixture, and carefully protected from bugs by the customary 

 measures. Early in the season the vines on the no-potash 

 plots showed a marked inferiority in growth. They were 

 characterized by a dark, bluish-green color. The vines on 

 the plots receiving chlorides in any form showed a distinctly 

 lighter shade of green (pea green) than those manured wath 

 other potash salts. The vines on the silicate of potash plots 

 were very dark in color, and somewhat resembled in general 

 appearance, though much larger in growth, the vines on the 

 no-potash plots. 



The yields per plot and the rates of yield per acre are 

 shown in the following table : — 



