36 # 



Effect on Grape Yields 



Vineyards soedod to covor crops for 5 consocutive years, 1924-1928, 

 yielded in 1928 8 percent more than neighboring vineyards v/hich had not 

 been seeded to cover crops during the 5-yoar period, (table 29.) The 

 4-year average yields (1924-1927) for vineyards seeded to cover crops in 

 each of the 5 yerirs v/as 9 percent greater than for nolgliboring vineyards 

 not seeded. 



Table 29. - Relation of the use of cover crops to Concord yields 

 on vineyards for which cover crop practices motq reported 

 during 5-year period, 1924-1928 1/ 



Years that vineyard 

 ^7as seeded during 

 5-yoar period, 1924-1928. 

 (Number) 



: Vineyards 



*- 



Rolotivi 

 1924- 



3 Concord yields 2/ 



• 

 • 



-1927 : 1928 











: Number 





Percent 



, Percent 







None 

 1 to 2 

 3 to 4 

 5 



Total or 



average : 



: 159 

 : , 54 

 : , 34 

 : 61 







97 : 

 91 

 107 : 



106 J 



: 97 

 : 99 

 ; 100 

 : 105 







308 







100 : 



1 100 



1/ The vineyards studied in Arkansas v/ero for the 5-year period 1925-1929, 

 2/ Average yield per acre of vineyard receiving indicated cover-crop treat- 

 ment divided by average yield of all vineyards. 



INCRE/iSE IN FERTILIZING PRACTICES, 1908-1928 



An experimental vineyard laboratory \kxs established at Frcdonia, 

 N.Y., in 1909, in charge of F, E. Gladv/in, and the first work done by the 

 staff V7as to interview 482 growers in Chautauqua County concerning their 

 vineyard practices and pro^^lems. 



For the vineyards studied, the proportion of growers using manure v;as 

 about the same in 1908 as ^in 1928, 79 and 75 percent, rcispectively. (table 30, 

 The proportion:. of growers using fertilizer had increased during the 20 years, 

 30 percent more growers having applied fertilizer to their vine^/a^rds in 1928 

 than in 1908^ There was also a large increase in the practice of seeding 

 vineyards to cover crops. .Out of 100 vineyards, 14 vineyards in 1908 and 

 22 vineyaj'ds in 1928 were seeded. 



Table 30. - Com.parison of fertilizing practices on 482 vineyards studied 

 in 1908 with 114 vine:yTtrds studied in 1928, ChautaucLua County, N.Y. 1, 



Kind of 

 treatment 



Commercial fertilizer 



Manure 



Cover crop 



Percent 

 48 

 75 



Percentage of vineyards that were treated : Increase or 



1908 : 1928 : decrease from 



(482 vineyards) ; (114 vine^mrds) :1908 to 1928 



Percent 

 + 30 

 - 5 

 + 57 



Percent 

 37 

 79 

 14 



1/ The study in 1908 was made by F. E. Gladwin. Data contained in unpublished 

 report entitled The Gra£e^,.Survey of Chautauqua iirea. 



