78
Grain yield (bu./acre) 153 (28) 161 (32) 180 (21) 201 (23) 176 (19) 180 (44) 182 (21) b 175 (18)
Stover yield (tons/acre) 2.3 (0.34) 2.49 (0.08) 2.78 (0.21) 3.54 (0.18) 2.62 (0.25) 3.19 (0.21) 2.75 (0.25) b 2.69 (0.25) 2.61 (0.23) 2.41 (0.2) 2.83 (0.21) 2.91 (0.31) 3.09 (0.28) 3.18 (0.26) a 2.54 (0.3) 3.21 (0.19) 3.35 (0.23) 3.29 (0.31) 3.44 (0.2) 3.26 (0.2)
N uptake (lb./acre) 144 (18) b 110 (20) 125 (14) 146 (11) 181 (10) 137 (7) 168 (18) 148 (15) b 126 (9) 132 (16) 159 (20) 152 (9) 156 (18) 162 (10) 173 (13) a 136 (14) 170 (9) 185 (8) 178 (12) 191 (5) 181 (13)
Herbicide
175 † (27) ‡ b* 2.82 (0.29) b
0
40 80
120 160 200
Orthman
0
40 80
165 (22) 196 (32) 194 (14) 175 (24) 190 (21) 193 (20) 223 (6) 218 (3) 207 (15) 232 (1) 207 (12)
120 160 200
Rotary zone tillage 213 (12) a
0
40 80
120 160 200
P > F
Row treatment Fertilizer N rate Row x N rate
< 0.001
< 0.001 < 0.01
< 0.0001 < 0.0001
0.34 0.83
0.12
0.29
† Treatment means. ‡ Standard error of treatment means. * Within a column for a given fixed effect, means followed by the same letter are not significantly different at P < 0.05.
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