Planting and post-planting applications are important in soil physical properties, seed distribution, seedlings emergence and yield of maize (Zea mays L.). Main objective of this research was to evaluate the effects of field traffic and sowing speeds on soil physical properties, seedling emergence, sowing performance and crop yields for maize production. This two-year study was conducted on Igdir plain soils (clay Petrocambids) in the eastern region of the Turkey from 2014 to 2015. A tractor used for three different wheel traffic applications; no traffic (C0), one pass (C1) and two passes (C2) with three different sowing speed; 5.4 (V1), 7.2 (V2) and 10.8 ( V3) km.h(-1). The hypothesis of this work included that the field traffic would cause changing in soil physical properties that maize yields would be affected and also an increasing in sowing speed would affect the sowing quality. Results showed that penetration resistance value produced by C2 treatment was higher. The highest average green herbage yield and plant height values were found in 2015 the measurement for C2 treatments were 650.5 kg.ha(-1) and 2580 mm, respectively. Soil water content (42.71, 53.05, 55.35) and soil temperature (19.46 degrees C, 19.65 degrees C, 19.76 degrees C) increased with increase in C0, C1 and C2, respectively. Increase in sowing speed cause disturbance of uniformity of seed in seedbed. Seedlings emergence were positively affected by soil compaction but there was no statistically significance seed distribution and seed uniformity.
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