Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 11 April 2006
Published in Agron J 98:562-568 (2006)
DOI: 10.2134/agronj2005.0181
© 2006 American Society of Agronomy
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Comparative Growth and Yield of Cotton Planted at Various Densities and Configurations

Jonathan D. Sieberta,*, Alexander M. Stewartb and B. Rogers Leonardc

a Louisiana State Univ. AgCenter, Dep. of Agronomy and Environmental Management, 104 M.B. Sturgis Hall, Baton Rouge, LA 70803
b Louisiana State Univ. AgCenter, Dean Lee Research Station, 8105 Tom Bowman Drive, Alexandria, LA 71302
c Louisiana State Univ. AgCenter, Dep. of Entomology and Macon Ridge Research Station, 212 Macon Ridge Road, Winnsboro, LA 71295


Figure 1
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  		Fig. 1. Weekly (bars) and total (lines) rainfall for May through August, 2003 and 2004. Weather data collected at the Dean Lee Research Station near Alexandria, LA.

 

Figure 2
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  		Fig. 2. Effect of plant population on cotton plant height, Alexandria, LA, 2003. Plant populations (plants ha–1) are averaged across drill and hill-drop seeding configurations. The p-value represents repeated measures analysis of plant height over the duration of data collection with the table representing treatment separation for repeated measures analysis, populations followed by the same letter are not significantly different ({alpha} = 0.05). Bars from left to right represent populations of 152 883, 76 466, 50 958, and 33 975 plants ha–1, respectively; final plant height of treatments followed by the same letter are not significantly different ({alpha} = 0.05).

 

Figure 3
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  		Fig. 3. Effect of plant population on total number of main stem nodes per plant, Alexandria, LA, 2003. Plant populations are averaged across drill and hill-drop seeding configurations. The P value represents repeated measures analysis of total main-stem nodes; 33 975, 50 958, and 76 466 plants ha–1 do not significantly differ and are significantly greater than 152 833 plants ha–1 ({alpha} = 0.05).

 




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