. Practices followed by grape growers in fertilizing, tilling, spraying, and dusting, in New York, Pennsylvania, Michigan, and Arkansas vineyards. A preliminary report. Viticulture; Grapes. 24: • In this vineyard a gxYon quantity of fertilizer sppliod to the vxeakost grow- ing vines procluccd about twice as many grapes as when applied to the strong- eat grov/in^ vines. At 1928 prices, the value per acre of the increase in grapo yield over the cost of fertilizer, averaged \|18 for the v^eakest grow- ing vines compared v;ith $3 for the strongest grov/ing vinos• In this vineyard, at 19S8 prices,
. Practices followed by grape growers in fertilizing, tilling, spraying, and dusting, in New York, Pennsylvania, Michigan, and Arkansas vineyards. A preliminary report. Viticulture; Grapes. 24: • In this vineyard a gxYon quantity of fertilizer sppliod to the vxeakost grow- ing vines procluccd about twice as many grapes as when applied to the strong- eat grov/in^ vines. At 1928 prices, the value per acre of the increase in grapo yield over the cost of fertilizer, averaged \|18 for the v^eakest grow- ing vines compared v;ith $3 for the strongest grov/ing vinos• In this vineyard, at 19S8 prices, it proV:bly paid to fertilize all virBS but it paid about 5 times bettor to fertilize the v/eakest vines than it did to fertilize the stronc^est vines f At 19B8 prices, the most profitable fertilizer application used on the Barrett vinoyord v/as E18 pounds of sodium nitrate and 435 pounds of acid phosphate. '%he value pet? aero of the increased yield over the cost of ferti- lizer uas $15, compared v/ith flO when nitrate was used alone* The use of nitrate of soda was slightly more profitable than the use of ammonium sul- pha to« Of the 91 Michigrn intorvietirGd grovrers, only 8 applied any phosphoric acid to their vingyards in 1928 and none of these applied as heavy an applica- tion as v;as used in the tost on the Barrett vineyard• On the Barrett vineyard 218 pounds of sodium nitrate and S18 pounds of muriate of potash gave increased yields about equal to tho nitrate-phOBphate combination, v/hich was about nO percent greater than the gains in yield when nitrate was applied alone. At 19E8 prices the nitrate potash combiiaation did not pay as well as tho nitrate phosphate combination but paid better than wheti nitrate was used alone* T/lion both phosphato and potash v/erc combined with nitrate, tho yields nexo not increased over tho nitrate phosphate or nitrate potash combinations• Cnly 6 of the 91 Michigan growers interviowod applied potash to their vineyards in 1928» T
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Keywords: ., bookcentury1900, bookpublisherwashington, booksubjectviticulture
