11. 



Tabic 8, - Average grape ^'•iclds in 1928 for' Chautauqua-*EriC vineyards 

 that rccoiYoci specified ap;,^lications ef plant food, in both 



1927 and 1928 



Soil type 



Light-toxtured soils 

 ( gravelly , sandy loan) 



Average 



Heavy- textured soils 

 (loam, silt, clay) 



Average 



iPlant food axpliod per acre 



; Concord gin pes; 



; Re turn 

 , per ; 





; : :Phos- : 



: Yield: Acre-' 



:Vino- 



Range :Nitro-:phoric;Pota3h 



: per :age per 



:hour of 



: yards 



: gen :acid 



: acre: farm : 



; labor 





Pounds iPounds :Pounds rpounds ; 



: Tons: Acres : 



; Cents ; 



iNvmber 



Lgs s : ; : ; 









than 45: 10 : 3 : 1 : 



: I986: 22 



: 14 



; 15 



:45 - 90: 28 : 25 • : 14 



1^ # «!!) f » Cv/O 



; 16. 



; 23 



Over 90: 30 : 52 : 54 



; 2.65: 29 



; 18 



: 15 



- : 25 : 28 : 17 



: 2,33: 26 



: 16 ; 



: 53 



: : : : 



> • < 



; 1,48: 21 ; 



: 2 ■ 



; 29 



8 - 59: 20 : 6 : 4 



; 1.65: 31 ; 



; 6 



: 18 



Over 59: 23 : 51 : 11 : 



1,75: 16 ; 



; -6 



: 18 



: 12 : 13 : 4 



: 1.60: 22 



! 1 



: 65 



On the heavier soils, potash v/as applied to 50 percent and on the 

 lighter soils, to 70 percent of the. vineyards fertilised* When potash was 

 applied, an average of, 15 pounds per acre on the ho'"vy soils, and 27 pounds 

 per acre on the lisht soils r/a 



1 1 '- r« ''^ 



More of the vlnoyards on the lighter toxturod soils r/ere fertilized 

 than on the heavy textured soils because fertilizers have given greater in- 

 creases, in yield on the light textured soils. Lack of drainage limited the 

 production of many vineyards on the hoo.vj textured soils. Not much increase 

 in yield from the use of fertilizers can be expected on poorly drained soils. 



On the light-textured soils, vineyards; fertilized the heaviest, pro- 

 duced on the average 42 percent more grapes per acre than did vineyards not 

 fertilized or fertilized very little. On the heavy soils the vineyards ferti- 

 lized the most produced only 18 x'^rcent more grapos jjor acre than did those 

 not fertilized. 



Even at the low prices for grapes in 1928, the return per hour of 

 labor from, vineyards on the lighter soils that were fertilized the heaviest, 

 averaged 18 cents per hour \7hich was 4 cents more per hour than the average 

 returns from vineyards not fertilized. Fertilizers on the lighter textured 

 soils apparently paid,, on the average, in- 1928^ 



Vineyards on the heavy soils that received the most fertilizer returned 

 nothing for the labor spent on the vineyards and lacked 6 cents per hour of 

 paying other ..costs.; . On the heavier soils not fertilized the return per hour 

 of labor \.as 2 cents, (table 8,) On the average, the vineyards on the heavy 

 soils v/ero much less productive than those on the , light soils, and the -in-- ■ 

 creased yield from the uaC' of fertilizers :apparently did not pay for the added 

 expense in 1928. 



