40
h
a l
-
36
5 3 2
E 28
b
al 24
E
f 20
0,
c
.+
0
h
>
-0
0
c
.3
g 169
s
;F” 12a -
s
u)
+
0
z
4 -
n
l
-
-
-
-
-
-
:\
/ ‘.
\
I
\
\
a
/
/
,’-Swallow
‘ 1
\
58
59
60
61
62
63
6 4 65
66
Year
FIG. 3. The temporal sequence of some spring barley varieties at North Farm, 1958-1972.
h
a l
-
36
5 3 2
E 28
b
al 24
E
f 20
0,
c
.+
0
h
>
-0
0
c
.3
g 169
s
;F” 12a -
s
u)
+
0
z
4 -
n
l
-
-
-
-
-
-
:\
/ ‘.
\
I
\
\
a
/
/
,’-Swallow
‘ 1
\
58
59
60
61
62
63
6 4 65
66
Year
FIG. 3. The temporal sequence of some spring barley varieties at North Farm, 1958-1972.