588 Report of the Department of Horticulture of the 



The amounts of wood pruned further emphasize the fact, stated 

 before, that the west part of the vineyard, in which are located 

 plats 1, 2 and 3, is somewhat weaker than the remainder of the 

 section. Coming to the several plats we find that those on which 

 the complete fertilizer and lime were used have pruned 375 pounds 

 more wood per acre, during the three-year period, 1911, 1912 and 

 1913, than the check, while 352 more canes per acre were put up 

 than in the check. From the complete fertilizer plats were pruned 

 452 pounds more wood per acre than in the check, yet 499 more 

 canes were left. From the nitrogen and phosphorus plats were 

 pruned 357 pounds more wood and 474 more canes were left. From 

 the nitrogen and potassium plats were pruned 48G pounds more 

 than the check and 535 canes more were put up, while from the 

 phosphorus and potassium plats were pruned 121 pounds more 

 wood per acre and 121 canes more than in the check were put up. 



These data seem to signify that the fertilized plats are producing 

 a larger annual wood growth than the unfertilized check, as well 

 as bearing more fruit. Table IX gives the averages for 1911, 1912 

 and 1913 of the amounts of wood pruned per acre from each plat 

 and the number of canes per acre put up during 1912, 1913 and 1914. 



Table IX. — Comparative Wood Growth of Grape Vines in Fertilizer 



Experiments. 



o 



1 

 2 

 3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 



Treatment. 



Complete fertilizer; lime. . . 



Complete fertilizer 



Nitrogen and phosphorus . 

 Nitrogen and potassium . . 

 Phosphorus and potassium 



Check 



Complete fertilizer; lime. . 



Complete fertilizer 



Nitrogen and phosphorus. 

 Nitrogen and potassium . . 

 Phosphorus and potassium 



