Agriculture Reference
In-Depth Information
Table
Number of leaves produced during a six week period at
different temperatures: 'Cox's Orange Pippin' apple trees
.
Temperature of C.E. rooms
.
◦
C
.
◦
C
.
◦
C
Leaves per shoot
From Abbott (
). Reproduced with permission.
30
SHOOT LEAVES
20
10
FB
SPUR LEAVES
0
15
APRIL
30
15
MAY
31
15
JUNE
30
Figure 7.2
Seasonal development of the leaf canopy of a 7-year-old
'MacSpur McIntosh' apple tree. FB,Full Bloom. From Forshey
et al
.
(1987). Reproduced with permission.
) showed that individual apple leaves had a typi-
cally sigmoid growth curve and, in England, took about
Hancock and Barlow (
days to grow from
). Apple leaves are simple
in shape and their areas have a consistent relationship to that of the rectangle
cm in length to a maximum of
cm (Figure
.
