New York Agricultural Experiment Station. 923 



and lime appears to be of no benefit. Financially, the complete fer- 

 tilizer and lime combination, the nitrogen and phosphorus combina- 

 tion and the phosphorus and potassium combination failed to pay 

 their cost in five of the ten comparisons; the complete fertilizer was 

 used at a loss four times out of ten; and the nitrogen and potassium 

 combination three times out of ten. Lime had no appreciable effect 

 on either vines or fruit. 



No effect of the fertilizers on the fruit itself, aside from yield, was 

 shown for the first three years; but in 1912, and even more markedly 

 in 1913, the fruit from the plats on which nitrogen had been used 

 was superior in compactness of cluster, size of cluster and size of berry. 

 In 1912 also, when early ripening was a decided advantage, the fruit 

 on the nitrogen plats matured earlier than that on the check plats. 

 In 1913 the favorable ripening season and the smaller crop tended to 

 equalize the time of ripening on all plats. The grapes on the phos- 

 phorus-potassium plats were better in quality than those in the check 

 plats but not as good as those on the plats where nitrogen was used. 



Other indexes also show plainly the benefit from nitrogen in this 

 vineyard; for size and weight of leaf, weight of wood produced and 

 number of fruiting canes left on the vines were all greater where 

 fertilizers, and particularly nitrogen, had been used. The three-year 

 averages (1911-1913) of the measurements for these characteristics 

 are shown in Table III. 



Table III. — Comparative Production of Leaves, Wood and Fruiting Canes 

 on Grape Vines Differently Fertilized. 



(Averages for three years.) 



Fertilizer Application. 



Fruiting 

 canes left.| 



Complete fertilizer; lime. . 



Complete fertilizer 



Nitrogen and phosphorus. . 

 Nitrogen and potassium. . . 

 Phosphorus and potassium 

 Check 



2,468 

 2,609 

 2,585 

 2,646 

 2,326 

 2,110 



*Each weight is of 300 green leaves, 5 from each of 60 vines, 

 the last cluster was selected. 



t Amount per acre of wood pruned in fall, 

 t Number per acre. 



The first leaf beyond 



In order to secure information as to the behavior of 



Cooperative fertilizers on the different soils of the Grape Belt, 



experiments, cooperative tests were carried on in six vineyards 



owned, respectively, by S. S. Grandin, Westfield; 



Hon. C. M. Hamilton, State Line; James Lee, Brocton; H. S. Miner, 



