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A
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Table 2.
Tree height, TCA, average yield efficiency, tree survival, and approximate returns (with and without accounting for observed tree death) for ‘Cripps Pink’ and
‘Brookfield Gala’ on four different rootstocks planted at Western Maryland Research and Extension Center in Keedysville, MD.
z
Means within columns and cultivars followed by common letters do not differ at the 5% level, by Tukey’s test.
y
Yearly yield divided by the same year’s trunk cross-sectional area (ie. 2012 yield /2012 truck cross-sectional area)
x
Assuming 18.1kg (40lbs) per bushel and $8 per bushel ($0.20/lb) without any tree death
w
Survival is presented as the percentage of trees that survived out of 28 total trees for each scion-rootstock combination.
v
Assuming 18.1kg (40lbs) per bushel and $8 per bushel ($0.20/lb) accounting for observed tree death
Table 2. Tree height, TCA, average yield efficiency, tree survival, and approximate returns (with and without accounting for observed
tree death) for ‘Cripps Pink’ and ‘Brookfield Gala’ on four different rootstocks planted at Western Maryland Research and Extension
Center in Keedysville, MD.
Variety
Rootstock
Height
(m)
TCA (cm
2
)
Efficiency
(kg/cm
2
)
y
Approx.
Return
($/ha)
x
Survival
(%)
w
Apprx
Return
($/ha)
v
2012
2013
2012
2013
2015
2012
2013
2015
2015
2015
Brookfield
Gala
G.202
2.6 b
2.9 b
z
10.4 b
13.7 b
26.9 b
1.2 a
0.9 c
0.4 a
6,971
100
6,971
G.202TC
3.5 a
4.1 a
17.3 a
22.4 a
38.9 a 0.4 b
1.0 bc
0.5 a
12,359
89
11,000
G.41
2.9 b
3.5 b
11.2 b
14.8 b
26.0 b
0.8 ab
1.3 ab
0.8 a
12,581
100
12,581
G.935
2.7 b 3.3 bc 13.5 ab
17.0 ab
29.5 b
0.9 ab
1.4 a
0.8 a
14,853
96
14,259
P-value
0.0011
0.0011
0.02
0.01
0.01
0.02
0.01
0.0318
NA
NA
NA
Cripps
Pink
G.202
2.5 b
3.0 b
13.2 ab
158.8 ab
36.6
0.8 ab
0.6
0.4
10,074
100
10,074
G.202TC
3.0 a
3.6 a
15.8 a
22.5 a
43.4 0.4 b
0.6
0.5
13,186
96
12,659
G.41
2.5 b
2.9 b
13.2 b
20.0 ab
35.4
0.8 ab
0.6
0.6
13,894
50
6,947
G.935
2.4 b
2.4 b
12.2 b
18.5 b
37.4
1.0 a
0.8
0.4
9,803
68
6,666
P-value
0.0005
0.0002
0.02
0.02
0.13
0.04
0.29
0.2267
NA
NA
NA
z
Means within columns and cultivars followed by common letters do not differ at the 5% level, by Tukey’s test.
y
Yearly yield divided by the same year’s trunk cross-sectional area (ie. 2012 yield /2012 truck cross-sectional area)
x
Assuming 18.1kg (40lbs) per bushel and $8 per bush l ($0.20/lb) without any tree death
w
Survival is presented as the percentage of trees that survived out of 28 total trees for each scion-rootstock combination.
v
Assuming 18.1kg (40lbs) per bushel and $8 per bushel ($0.20/lb) accounting for observed tree death