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Tillage System Effects on Competition between Barley and Sterile Oat

^a Agron. Lab., Technol. & Educ. Inst. of Thessaloniki, 541 01 Thessaloniki, Greece
^b Weed Science Lab, Technol. & Educ. Inst. of Larissa, 411 10 Larissa, Greece
^c Agron. Dep., Univ. Farm, Aristotle Univ. of Thessaloniki, 570 01 Thermi, Greece
^d Entomol. Lab., Technol. & Educ. Inst. of Thessaloniki, 541 01 Thessaloniki, Greece
^e Agron. Lab. Aristotle Univ. of Thessaloniki, 541 24 Thessaloniki, Greece

View larger version (23K): [in a new window]   Fig. 1. Total monthly rainfall and mean monthly temperature during the experiment.

View larger version (26K): [in a new window]   Fig. 2. Temporal pattern in stem number of sterile oat grown with barley during the 2003–2004 and 2004–2005 growing seasons. Lines describe linear regression equations (data before the multivariate analysis of variance [MANOVA] were (x + 1)-transformed, but the mean values used were back-transformed). MT, minimum tillage; RT, reduced tillage; CT, conventional tillage.

View larger version (29K): [in a new window]   Fig. 3. Temporal pattern in fresh weight of sterile oat grown with barley during the 2003–2004 and 2004–2005 growing seasons. Lines describe quadratic regression equations (data before the multivariate analysis of variance [MANOVA] were log(x + 1)-transformed, but the mean values used were back-transformed). MT, minimum tillage; RT, reduced tillage; CT, conventional tillage.

View larger version (26K): [in a new window]   Fig. 4. Temporal pattern in barley stem number in the presence of sterile oat during the 2003–2004 and 2004–2005 growing seasons. Lines describe linear regression equations (data before the multivariate analysis of variance [MANOVA] were (x + 1)-transformed, but the mean values used were back-transformed). MT, minimum tillage; RT, reduced tillage; CT, conventional tillage.

View larger version (29K): [in a new window]   Fig. 5. Temporal pattern in barley fresh weight in the presence of sterile oat during the 2003–2004 and 2004–2005 growing seasons. Lines describe quadratic regression equations (data before the multivariate analysis of variance [MANOVA] were log(x + 1)-transformed, but the mean values used were back-transformed). MT, minimum tillage; RT, reduced tillage; CT, conventional tillage.