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Spatial Yield Response of Two Corn Hybrids at Two Nitrogen Levels

Tawainga W. Katsvairo, William J. Cox*, Harold M. Van Es and Michael Glos

Dep. of Crop and Soil Sci., 609 Bradfield Hall, Cornell Univ., Ithaca, NY 14853



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  		Fig. 1. Soil NO3–N concentrations in the upper 30-cm soil depth in late-spring of 1999, 2000, and 2001 using ArcGIS at the Onondaga 1 (a, b, c) and Onondaga 2 (d, e, f) sites.

 


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  		Fig. 2. Soil NO3–N concentrations in the upper 30-cm soil depth in late-spring of 1999, 2000, and 2001 using ArcGIS at the Seneca 1 (a, b, c), Seneca 2 (d, e, f), and Seneca 3 (g, h, i) sites.

 


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  		Fig. 3. Corn yields in 1999, 2000, and 2001 using ArcView at the Onondaga 1(a, b, c) and Onondaga 2 (d, e, f) sites.

 


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  		Fig. 4. Corn yields in 1999, 2000, and 2001 using ArcView at the Seneca 1 (a, b, c), Seneca 2 (d, e, f) and Seneca 3 (g, h, i) sites.

 


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  		Fig. 5. Corn yield differences, based on LSD (0.05) interaction values, in 1999 and 2001 using ArcGIS between N rates at Seneca 3 (a = 1.0 Mg ha-1 LSD, b = 0.9 Mg ha-1) and between hybrids at Onondaga 1 (c = 1.0 Mg ha-1, d = 1.4 ha-1) sites.

 




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