Agriculture Reference
In-Depth Information
So, the next objective is to find out the
varieties which differ significantly among them-
selves and the variety/varieties having signifi-
cantly highest yield.
To compare the varieties we calculate the
critical difference value, which is given as
compare the differences with CD value as
follows:
Variety
Avg. yield (q/acre)
Variety E
21.9
Variety B
19.7
Variety F
17.4
Variety D
17.2
s
Variety C
16.4
1
r
i
þ
1
r
i
0
MSE
t
0
:
025
;
err
:
d
:
f
:
Variety G
16.2
Variety A
16
s
1
r
þ
1
r
¼
4
:
464
t
0
:
025
;
28
s
2
5
¼
4
:
464
2
:
048
Varieties joined by the same line are statisti-
cally at par; that is, they are not significantly
different among themselves. Thus, varieties E
and B; varieties B, F, and D; and varieties F, D,
C, G, and A are statistically at par. From the
above, it is clear that variety E is by far the best
variety giving highest yield followed by variety
B, which are statistically at par, and variety A is
the lowest yielder.
¼
2
:
737
;
where
r
i
0
are the number of observations of
the two varieties under comparison and for this
problem all are equal to 5.
We arrange the mean values corresponding
to different varieties in descending order and
r
i
and
Slide 10.15: Step 1 showing the data for analysis of CRD using SAS
