Erratum to: The critical soil P levels for crop yield, soil fertility and environmental safety in different soil types

The original version of this paper unfortunately contained errors.The site description of Haerbin and Yangling were wrong it should be "Haerbin in northeast of China" and "Yangling in south China".In Results sector, the correct description of relationship of Olsen-P and crop yield should be "Chongqing (R 2 =0.46-0.78),and Qiyang (R 2 =0.20-0.48)".In Figure 2, "Chongqing Maize" should be "Chongqing Wheat".In Discussion sector, the average temperature of two sites are wrong, the correct sentence should be "The mean annual temperature is indeed lower in Yangling (13 °C) than in Chongqing (18 °C)."