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Tillage Effects on Corn Production in a Coarse-Textured Soil in Southern Ontario

Southern Crop Protection and Food Res. Cent., P.O. Box 186, Delhi, ON, Canada N4B 2W9

View larger version (30K): [in a new window]   Fig. 1. Effect of tillage systems on mean daily soil temperature (T) at corn seeding depth (4 cm), 1997–1999. Tillage systems were conventional moldboard plow (CT), no-till (NT), and zone tillage (ZT). Vertical bars represent least significant difference values ( = 0.05). The absence of vertical bars indicates that no significant difference among the treatments was determined by an F-test ( = 0.05).

View larger version (33K): [in a new window]   Fig. 2. Effect of tillage systems on corn emergence (EM) and accumulated growing degree days (GDD) at corn seeding depth (4 cm), 1997–1999. Tillage systems were conventional moldboard plow (CT), no-till (NT), and zone tillage (ZT). Vertical bars represent least significant difference values determined by an F-test ( = 0.05). The absence of vertical bars denotes no significant difference among treatments. No difference among treatments in the emergence data is shown by NS. DAP, days after planting.