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Table 1 Soil characteristics at the experiment site (n = 3 for all parameters). Figures in parentheses represent standard errors; different letters indicate significant differences between groups at p < 0.05

From: Two-year field monitoring shows little evidence that transgenic potato containing ABF3 significantly alters its rhizosphere microbial community structure

Soil characteristics 2009 2010
Non-transgenic Transgenic Non-transgenic Transgenic
pH 7.00 (0.05)a 7.06 (0.05)a 6.69 (0.03)b 6.80 (0.03)b
Organic matter content (%) 4.0 (0.2)a 4.0 (0.2)a 5.3 (0.2)b 5.2 (0.4)b
N (g/kg) 1.03 (0.18)a 1.15 (0.21)a 1.33 (0.23)a 1.92 (0.33)a
Available P (mg/kg) 271.0 (20.7)a 273.4 (62.0)a 120.8 (16.0)b 148.9(22.4)b
Exchangeable K (mg/kg) 56.3 (12.6)a 52.1 (6.3)a 87.4 (22.0)a 65.9 (10.6)a
Sand (%) 77.8 (1.2)a 77.1 (1.5)a 69.8 (1.3)b 69.1 (1.8)b
Clay (%) 6.7 (0.9)a 6.4 (0.9)a 12.2 (0.02)b 13.2 (1.5)b
Silt (%) 15.5 (0.3)a 16.5 (0.7)a 18.0 (1.3)a 17.6 (0.9)a