7. 



For the vineyards fertilized in all the areas, an average of 334 

 pounds., of fertilizer v/ore applied per acre, v/hich cost the grov/ers $7^S8. 

 The. Qirard vineyards tte^^ uere fertilized v/ith mixed fertilizers had on the 

 average tha )ieaviest application, 718 pounds per acre, which cost $15.40* 

 On ^the average, vinej^ards at North East, Pa., that were fertilized, received 

 about... .two., thirds as much fertilizer per acre as the Girard vineyards. The 

 fertilizer : applications for Hudson Valley as 'given in table 3 include, only 

 about threes fourths of the total application per acre of land; since .for 

 those vineyards that Y/cre . interplanted, only a part of * the total fertilizer 

 application was charged to grapps. The total fertilizer apilications in the 

 Hudson Valley were, slightly heavier than in the North East area. 



The average, application- of sodium nitrate on the Finger Lakes- vine- 

 yards was 173 pounds per acre, v/hich cost $5*. 20. In Chautauqua County, on 

 the average, 225 pounds of sodiuia nitrate worp applied per acre. In Chau- 

 tauqua County when both s-odiura nitrate and acid phosphtito v/ere applied, the 

 average ra'tc of sodium nitrate x/as 156 pouncfs and 'of acid phosphate 284 pounds. 

 In -Michigaji, ammonium sulphate j/as applied dt the average rate of 140 pounds 

 per acre, .-which cost §4.18. Michigan and Arkanscls ware the only ai?cas where 

 the fertilizer applied cost on the average loss than 05.00 per acre^ 



Dates and Cost of Applying 



The Hudson. Valley. gro\7crs in 1928 fertilized 6 acrc^ of grapes in 

 April to Dach 4 acres fartilizod in May. Of the acreage fertilized- in Michi- 

 gan,, about one half (46.8 percent*) 'was -treated before- May, and 11 percent 

 after May. (table. 4.) , .Some growers dolaye'd applying fertilizer until the 

 vineyard was plowed and harroY/od. In 'the Chautauqua-Erie area about half the 

 acreage was fertilized in the first 2 weeks in May. On the lighter textured 

 soils in the Chautauqua -Erie area, one third of the acreage was fertilized 

 in April whereas on the heavier textured soils about one foiirth of the acreage 

 was fertilized in June and July. Fertilizers wore generally applied later 

 in the season in the Finger Lakes area than in the Chautauqua-Erie area. 3f 

 the acreage fertilized in the Finger Lakes area, 4 acres cut of aach 10 acres 

 xiQTQ fertilized in June. 



To got the best results, from nitrogenous fertilizers, Dr. Partridge 

 states 2/ that the ai)plication should bo made early in the season, at the 

 time whon the buds are bursting, if the full cffodt on g^rcwth is to be obtained 



On .the average, 1.3 ho-ui*s of nan labor per acre v;ore used to apply 

 fertilizer., (table 5..) For 24 farms in the Hudson Valley, the average amount 

 of ma.n labor was .4.1 hours per acre. P'or the other .sroas, the man labor 

 varied from an average of 1.0 hour for the vineyards in Michigaji and at North 

 East, Pa., to 1.9 hours 'for the vineyards in .Nir.gara Co., N.Y. The average 

 cost of man labor aiid pov/ei* used in fertilizing vineyards ^w^as |1.04 per acre. 



• 



2/ Partridge, N. Ll Cultaral "Methods in tho Bearing Vineyard Michigan Agri. 

 cultural Experiment "Station, Circular Bulletin No. 130, 1930. p. 8. 



