Cultivar-by-Row Spacing Study ---- Dallas 2000
 
Yield (bu/acre)
   
Cultivar
14-inch Rows
28-inch Rows
Height (in.)
Maturity (dap)
Deltapine DP4750RR
23.9
29.8
34
130
MFA 4477
22.8
29.3
27
129
Hyperformer HY 4540
20.4
29.7*
27
132
Croplan 466RR
25.3
26.0
32
133
Novartis NK3474
20.2
28.0*
33
134
Croplan 4792
18.7
27.2*
40
136
Garst 4882
19.3
25.0
34
133
Mid. Pre. Gen. MPV 457
23.1
23.2
29
129
Triumph TR4718
20.6
24.8
32
129
Sure-Grow SG 468RR
20.5
21.9
38
135
Taylor 488RR
16.1
22.4
29
134
Deltapine DP4690
17.1
18.5
34
134
Garst D485
7.9
23.2*
34
137
Garst 4888RR
14.1
12.0
34
133
LSD (0.05)      -----------   7.0   ------------
2
6
Mean
19.4
24.4
    

R8 dap = days after planting when crop was mature. The row spacing and interaction effects on maturity were not significant. Therefore, maturity dates are averaged across row spacing.

* Indicates 28-inch rows outyielded 14-inch rows for this cultivar

Acknowledgements:

We thank the seed companies for supplying the seed, Lipha Tech, Inc. for supplying the Cell-Tech 2000 inoculant, and the Texas Soybean Board for funding the project.

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