. 2020 Nov 17;10:19965. doi: 10.1038/s41598-020-77038-6

Table 2.

Mean concentration of sodium (Na) and macronutrients (N, P and K) in raw sanitary sewage, in addition to the amounts applied via fertigation and conventional mineral fertilization in the experimental plots during the 3 year experimental period.

Parameters	Average concentration*	Fertigation	Mineral fertilization
Parameters	(mg L⁻¹)	Input (kg ha⁻¹ year⁻¹)
Na	71.4 (± 21)	300	–
N	148.9 (± 33)	647	300
P	17.8 (± 6)	86	70
K	38.5 (± 11)	176	300

* n = 130; values in parenthesis are the standard deviations.