Agronomy Journal Journal of Natural Resources and Life Sciences Education
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Published online 1 January 2007
Published in Agron J 99:88-98 (2007)
DOI: 10.2134/agronj2006.0128
© 2007 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Hard Red Winter Wheat Cultivar Responses to a pH and Aluminum Concentration Gradient

S. K. Kariukia, H. Zhanga,*, J. L. Schrodera, J. Edwardsa, M. Paytonb, B. F. Carvera, W. R. Rauna and E. G. Krenzera

a Dep. of Plant and Soil Sciences, Oklahoma State Univ., Stillwater, OK 74078
b Dep. of Statistics, Oklahoma State Univ., Stillwater, OK 74078


Figure 1
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  		Fig. 1. Field configuration illustrating cultivar growth differences (left to right) along the pH gradient (bottom to top). The smaller arrows points to eight different cultivars; the big arrow points to the direction of soil pH increase.

 

Figure 2
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  		Fig. 2. Relationship between Al concentration (1.0 M KCl extraction) and pH for a Konawa soil at Perkins, OK. *** P < 0.001.

 

Figure 3
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  		Fig. 3. Relationship between percent Al saturation (Alsat%) and soil pH for a Konawa soil at Perkins, OK. *** P < 0.001.

 

Figure 4
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  		Fig. 4. Effect of Al saturation on forage yields for different winter wheat cultivars. ***P < 0.001.

 

Figure 5
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  		Fig. 5. Effect of Al saturation on grain yields for different winter wheat cultivars ***P < 0.001.

 

Figure 6
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  		Fig. 6. Effect of pH on forage yield for different winter wheat cultivars. ***P < 0.001; **P < 0.01.

 

Figure 7
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  		Fig. 7. Effect of pH on grain yield for different winter wheat cultivars. ***P < 0.001.

 




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