. 2020 Sep 14;27(11):3072–3078. doi: 10.1016/j.sjbs.2020.09.015

Table 4.

Effects of irrigation water type and different soil additives on macro and micronutrient contents of Calendula officinalis L. plants.

Factors		N (%)	P (%)	K (%)	Ca (%)	Mg (%)	Na (%)	Cl (%)	Fe (ppm)
A. Single factors
1. Irrigation water type
TW		3.83	0.49	3.12	0.89	3.62	0.36	0.52	248.9
MW		3.65	0.46	2.94	0.66	2.67	0.41	0.58	240.9
WW		3.74	0.34	2.23	0.57	2.14	0.57	0.82	196.9
LSD (P ≤ 0.05)		0.09	0.01	0.22	0.05	0.17	0.03	0.04	0.19

2. Soil additives
Cont.		2.23	0.27	1.59	0.53	2.24	0.56	0.81	225.6
PM		3.03	0.38	2.48	0.64	2.59	0.48	0.66	228.3
Fe₂SO₄		3.71	0.47	3.20	0.76	3.15	0.40	0.59	229.7
PM + Fe₂SO₄		4.65	0.59	3.77	0.89	3.25	0.33	0.49	232.1
LSD (P ≤ 0.05)		0.89	0.08	0.57	0.12	0.54	0.08	0.11	1.67

B. Interaction
TW	Cont.	2.51	0.31	1.88	0.71	2.53	0.49	0.71	245.3
	PM	3.41	0.43	2.92	0.86	3.31	0.39	0.56	248.2
	Fe₂SO₄	4.17	0.54	3.63	0.96	4.31	0.31	0.46	249.7
	PM + Fe₂SO₄	5.23	0.66	4.05	1.03	4.33	0.23	0.34	252.4
MW	Cont.	2.39	0.29	1.72	0.51	2.14	0.54	0.78	237.3
	PM	3.25	0.41	2.78	0.55	2.11	0.44	0.54	240.3
	Fe₂SO₄	3.98	0.52	3.42	0.71	3.11	0.35	0.51	241.7
	PM + Fe₂SO₄	4.99	0.63	3.82	0.86	3.32	0.32	0.47	244.3
WW	Cont.	1.79	0.22	1.18	0.37	2.06	0.66	0.95	194.1
	PM	2.42	0.31	1.73	0.51	2.35	0.61	0.88	196.5
	Fe₂SO₄	3.04	0.36	2.56	0.61	2.02	0.55	0.79	197.6
	PM + Fe₂SO₄	3.72	0.47	3.43	0.77	2.11	0.45	0.65	199.7
LSD (P ≤ 0.05)		0.11	0.07	0.17	0.06	0.07	0.04	0.07	0.09

TW: tap water, MW: magnetized water; WW: well water; PM: peat moss; LSD: least significant difference.