14 Florida Agricultural Experiment Stations

sider both, as well as the interrelationships between these two
measurements.
 Total yield and yield of high quality tobacco for 1949, 1950
and 1951 are shown in Tables 1 and 2. Each entry represents
the total pounds per plot for three replications of treatment.

 1949 RESULTS

 The analyses of variance for total yield and quality are given
in Table 3. Yield and quality differences for irrigation rates
of one-half inch and three-fourths inch per application were
highly significant over no irrigation. However, there was no
significant difference in yield or quality between the one-half
and three-fourths inch rates of irrigation.

TABLE 3.-ANALYSIS OF VARIANCE FOR YIELD AND QUALITY OF TOBACCO
 IN 1949.
 Degrees
 Source of Variation of Mean Square
 S Freedom Yield Quality

 Total ........ ..... .... .. -... .....-.. 143

 I Irrigation ............................ ....... 2 29.70** 58.52*"
 Blocks ..... ......... .................. 2 1.29 .46
 Error (a) .............. .. ......... 4 1.30 I .66
 II "Cultivation"t (Lupine-Fallow) 1 .32 1.85
 "Cultivation" x Irrigation ...... 2 .54 1.06
 Error (b) ................... ...............- 6 .25 .36
III "Variety"$ (Corn-Peanuts) .....-- 1 .21 2.51
 "Variety" x Irrigation ................ 2 .09 .44
 Error (c) .......-.. ................... 6 1.31 .61
IV "Variety" x "Cultivation" .......... 1 .06 .76
 "Variety x Cultivation" x
 Irrigation ....... .......... ... ...- 2 .40 .54
 Error (d) ............................... 6 .29 .16
 V Fertilizers ........... .. ...... ........... 3 5.71** 11.30**
 Fertilizers x "Variety" .............. 3 .80 2.21**
 Fertilizers x Irrigation ................ 6 1.69* 4.32**
 Fertilizers x "Cultivation" ......... 3 .10 .16
 Fertilizers x "Variety" x ....
 "Cultivation" ............................-- 3 .63 .77
 Fertilizers x "Variety" x
 Irrigation ................ ..... 6 .23 .38
 Fertilizers x "Cultivation" x
 Irrigation ... ........................... 6 .42 .38
 Fertilizers x "Variety" x
 "Cultivation" x Irrigation ........ 6 .27 1.14
 Error (e) .........-............-............ 72 .40 1 .51
 *Significant at .05 percent level.
 ** Significant at .01 percent level.
 t "Cultivation" refers to lupine or fallow for cover crops.
 : "Variety" refers to corn or peanuts in the rotation following the cover crops.