17t 



Phosphoric acid v/cis much noro offootivo. api^arontly. in increasing 

 grapo yields en tho Chautr.uqua-Erio vineyards than on the Fredonia test 

 plats, and potash was noro effoctivo on the test plats than on the vineyards • 



There is raoro or loss variability in tho natural productiveness of 

 different plats in tho sariio fiold, Tho authors mention that the west portion 

 of the V i no yiM including plats 2 and 3 v/as in poor condition. Phosphorous 

 was applied to both of those plats. Besides, plat 10 v/as unusually productive, 

 having the highest average yield. Nitrogen and potassium v/ere applied to 

 this plat. Other plats that received tho same applications of nitrogen and 

 .potassiuiii as plat 10, and in addition phosphoric acid, did not yield as w ell 

 as plat 10. If corrections could he made for the differences in the natural 

 productiveness of the different plats tho tost results for phosphorous and 

 potash would probably agree with tho experiences of tho Chautauqua-Erie growers 



In addition to the vineyard at tho Fredonia laboratory, fertilizer 

 tests were made in six other vineyards soloctod according to differences in 

 soil t3rpes and altitudes. 4/ 



Yields from 1910 to 19l3 were reported for 5 of these vineyards which 

 \7ere described in Bulletin No^ 381 of tho Now York Agricultural Experiment 

 Station, as follcv/s: 



"Tho Minor vineyajrd is situated on a level piece of lov/-lying land on 

 the Dunkirk clay typo, v/hich is as a rule much improved by under drainage." 



"Tho Lee vineyard is a typical upland vineyard situated on the hillside 

 south and east of Brocton. The soil is of tho Dunkirk shale loam type and 

 quite stony, ~ The natural drainage is better than in many vineyards, ov/ing 

 in part to the slope, yet rock pockets keop parts of tho land wet," 



"The Barnes vineyard at Prosi:Gct Station is another upland vineyard 

 situated on Dunkirk shale lo>n:r^. ^t differs from the Lee vine3rard in that it 

 lies very level belov/ a high ridge from which much seepAage water gains access 

 to it. It would be benefited by under drainage." 



"Tho Grandin vineyard at Westfield, located in part on Dunkirk gravelly 

 loam and tho reirjadnder on Dunkirk clay loam presents a well drained area 

 succeeded by a wet one. Approxirxitely tvio thirds of the length of tho rows 

 is on the Dunkirk clay loam while but one third is on^ the gravelly loam." 



"The Hamilton vineyard, located at State Lino and consisting of tv/o 

 acres, is situated on Dunkirk clay loam. This vineyard is v/et. Much seepage 

 water from the hills above rises to the surface over it." 



yhe authors summarize tho tests on these vine::,/ards as folio v/s: "The 

 data in the cooperative v/ork vritlx comj:aercial fertilizers, stable manure and 

 green manures are confusing and unsatisfactory. Unsiitisfactory because of the 

 great variability of the results from the troatmenta in any one vineyard or in 

 the several vineyards compared with one another, 'taken as a whole they do not 

 coDro'bQrate the vjork in the station vineyard at F'r©doriia#" 



• 



M l .*! * K' 



4/ Hedrick, U/p.y and Gladwin, F. E. A Tost of COTnercial Fertilizers for 

 Grapes, New York Agricultural Experiment Station, Bull* No. 381# Geneva, 1914^ 



