Table 5-6. Analysis of variance for corn grain, stover, and total dry
matter yields.
 Plant component
Source D.F. Error term Grain Stover Dry matter
 ------- F value------
Date 1 Rep(Date) / Date*Den*Fert 131**a
 Rep(Date) / Pooled error < Ia 16.3**a

Rep(Date) 2 Pooled error 3.14 1.62 2.51
Density 1 Pooled error 9.50** 30.5** 32.2**
Fertilizer 4 Pooled error 141** 36.9** 67.2**
Density*Fert 4 Pooled error 2.13 2.11 2.44
Date*Density 1 Pooled error 4.37 < 1 < 1
Date*Fert 4 Pooled error 22.8** < 1 1.34
Date*Den*Fert 4 Pooled error 1.29 < 1 < 1
Pooled Error 18
Total 39

C.V. 12.2 16.4 13.3

Date = Planting date
Rep = Replication
Den = Density = Planting density
Fert = Fertilizer = Fertilizer application schedule

a Mean square error pooled to increase degrees of freedom in order to
 enhance validity of the F test.
 ** 99% level of probability