Table 2. Cumulative yield per tree (1992-96) at the end of the 1996 growing season.

Rootstock

Jonagold

Empire

Rome

Average

M.9 EMLA

74 b

74 b

71 b

96 a

80 b

B.9

69 bc

60 c

53 c

79 b

65 c

Mark

61 c

54 c

43 d

62 c

55 d

O.3

94 a

81 ab

83 a

102 a

90 a

M.26 EMLA

89 a

85 a

77 ab

95 a

87 a

Average

78 b

71 c

66 d

87 a

Site

Arkansas

21 i

Colorado

32 h

Iowa

33 h

Indiana

48 fg

Kansas-Manhattan

139 b

Kansas-Wichita

126 c

Kentucky

80 d

Massachusetts

86 d

Maine

54 f

Ohio

149 a

Pennsylvania

49 gh

Tennessee

35 h

Utah

65 e

Virginia

150 a

Rootstock means within columns, average rootstock means, average cultivar means, or average site means are significantly different at odds of 19:1 if not followed by the same letter.