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Impacts of Zone Tillage and Red Clover on Corn Performance and Soil Physical Quality

C. F. Drury*,a, C. S. Tana, W. D. Reynoldsa, T. W. Welackya, S. E. Weavera, A. S. Hamilla and T. J. Vynb

a Greenhouse & Processing Crops Research Centre, Agriculture and Agri-Food Canada, Harrow, ON, Canada N0R 1G0
b Dep. of Agronomy, Purdue Univ., West Lafayette, IN 47907-1150



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  		Fig. 1. Corn emergence in 1997, 1998, 1999, and 2000 for the conventional tillage (CT), zone tillage (ZT), and no-tillage (NT) treatments with and without underseeded red clover (RC). The vertical bars indicate standard error (n = 8).

 


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  		Fig. 2. Surface residue cover in 1997, 1998, 1999, and 2000 for the conventional tillage (CT), zone tillage (ZT), and no-tillage (NT) treatments with and without underseeded red clover (RC). The vertical bars indicate standard error (n = 8).

 


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  		Fig. 3. Mean penetration resistance in 1998, 1999, and 2000 for the conventional tillage (CT), zone tillage (ZT) and no-tillage (NT) treatments with and without underseeded red clover (RC). The horizontal bars indicate LSD value at P = 0.05 (n = 12).

 


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  		Fig. 4. Wet aggregate stability (WAS) at 0-5 cm depth in 1997, 1998, 1999, and 2000 for the conventional tillage (CT), zone tillage (ZT) and no-tillage (NT) treatments with and without underseeded red clover (RC). The vertical bars indicate standard error (n = 4).

 




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