APS Journal July 2017

A pple

143

($/ha) v

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 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

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

2012 2013 2012 2013 2015 2012 2013 2015 2015 2015

Apprx

Return

Survival (%) w

($/ha) x

6,971

Return

Approx.

0.4 a

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. 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 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 Cripps Pink G.202 2.5 b 3.0 b 13.2 ab 158.8 ab 36.6 0.8 ab 0.6

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