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. 2016 Feb 19;6:21474. doi: 10.1038/srep21474

Table 1. Physico-chemical characteristics of the ditches used to collect natural organic matter and to perform the field OM-preference experiment.

  Transparency (cm) Conductivity (mS) Temperature (C) pH Oxygen (mg/L) NO2 (mg/L) NO3 (mg/L) Hardness (dGH) CO3 (mg/L)
Grassland ditches 22.6 ± 11.5 517.9 ± 328.7 14.9 ±1.9 8.1 ± 0.3 10.4 ± 4.2 0.2 ± 0.3 2.5 ± 5.0 15.6 ± 5.8 9.8 ± 5.0
Bulbfield Ditches 33.7 ± 22.7 785 ± 44.9 15.2 ± 2.4 8.6 ± 0.3 12.4 ± 3.2 0.6 ± 1.0 5.5 ± 4.9 17.5 ± 2.6 9.5 ± 4.4

No statistical differences were observed for all measured variables (mean ± s.d.) (Student’s T-tests).