Affect of Fertilization and Irrigation on Tobacco 23

TABLE 16.-YIELD OF TOBACCO IN POUNDS PER 12 PLOTs* FOR RATES OF
IRRIGATION WITH RATES AND TIME OF APPLICATION OF FERTILIZER IN 1951.
 SI 1 Mean
 Fertilizer Irrigation Irrigation Irrigation Total Yield
 Rates None 1/2 Inch % Inch Yield per Ploti

800 ................ 29.16 33.26 33.32 95.74 2.66
1,600 .....-....... 41.75 53.31 50.69 146.15 4.06
400 + 400**.... 32.92 58.76 48.49 140.17 3.89
800 + 800**.... 38.79 64.35 55.57 158.71 4.41

Totals 1....... 142.62 210.08 188.07 540.77

Meant ......-... 2.97 4.38 3.92 __
 To convert to yield per acre multiply each entry by 25.50.
 ** One-half of fertilizer was applied one week prior to transplanting, the other half
 approximately four weeks after transplanting.
 t LSD at .05 probability for irrigation means .54.
 $ LSD at .05 probability for fertilizer means .23.

TABLE 17.-YIELD OF HIGH QUALITY TOBACCO IN POUNDS PER 12 PLOTS*
 FOR RATES OF IRRIGATION WITH RATES AND TIME OF APPLICATION
 OF FERTILIZER IN 1951.
 Mean
 Fertilizer Irrigation. Irrigation Irrigation ) Total Yield
 Rates None ", Inch %z4 Inch Yield per Plot$

800 -............... 17.25 26.27 23.60 67.12 1.86
1,600 ............... 20.99 42.76 37.08 100.83 2.80
400 + 400**... 20.56 49.35 36.70 106.61 2.96
800 + 800**... 18.14 56.00 41.52 115.66 3.21

Totals .......... 76.94 174.38 138.90

Meant ........ 1.60 3.63 2.89
 To convert to yield per acre multiply each entry by 25.50.
 ** One-half of fertilizer was applied one week prior to transplanting, the other half approxi-
 ma'ely four weeks after transplanting.
 t LSD at .05 probability for irrigation means ,58.
 t LSD at .05 probability for fertilizer means .26.

TABLE 18.-YIELD OF TOBACCO IN POUNDS PER 24 PLOTS* AS AFFECTED BY
 TIME OF APPLICATION AND IRRIGATION AND RATE OF FERTILIZER
 AND IRRIGATION IN 1951.
 Average
 Irriga- Irriga- Irriga- Total Mean
 Treatment** tion tion tion Yield Yield
 None 1/2 Inch j % Inch per Plot

Time of Singlet 70.91 86.97 84.01 241.89 5.04
Application
 Applic Splits 71.71 | 123.11 104.06 298.88 6.22

Rate of 800 62.08 92.02 81.81 235.91 4.91
Application
 Applic 1,600 80.54 118.06 106.26 304.86 6.35

 To convert to yield per acre multiply each entry by 12.75.
 S** Differences between times and rates of fertilizer application are significant.
 tAll fertilizer applied before transplanting.
 $ One-half of fertilizer applied before transplanting, one-half one month after transplanting.