EC: electrical conductivity and TN: total nitrogen. NS: not significant.
Mean values denoted by the same letter in a row (sampling point/time) are not statistically different according to Tukey’s test at the 5% probability level.
nd: not determined, as mineral fertiliser was applied after S1 (same as control soil).
* Significant at probability level P < 0.05.
** Significant at probability level P < 0.01.
*** Significant at probability level P < 0.001.