. 2019 Oct 7;9:14403. doi: 10.1038/s41598-019-50730-y

Table 1.

Chemical characteristics of the soil samples collected among the three treatments (control, K and Mg fertilized) and the three sampling times (T0, T1 and T3).

Time	Treatment	K	Ca	Fe	Mg	Mn	Na	Al³⁺	H⁺	CEC	pH
Time	Treatment	cmol+ kg⁻¹ of soil									pH
T0	Ct	0.12	0.29	0.0029	0.077	0.21	0.067	2.25	0.14	3.17	4.65
T1	Ct	0.12a	0.29	0.0030	0.077a	0.20a	0.040	2.29a	0.13	3.15	4.66
	+K	0.28b	0.16	0.0023	0.047a	0.23b	0.038	2.19b	0.13	3.07	4.60
	+Mg	0.12a	0.21	0.0024	0.39b	0.23b	0.025	2.11c	0.12	3.20	4.56
Stat		<0.0001	0.23	0.29	<0.0001	0.023	0.89	0.0004	0.4	0.6	0.06
T3	Ct	0.12a	0.26	0.0024	0.07a	0.21a	0.003	2.29a	0.12	3.06	4.64
	+K	0.27b	0.17	0.0024	0.048a	0.23ab	0.043	2.20b	0.11	3.06	4.6
	+Mg	0.12a	0.26	0.0021	0.45b	0.25b	0.043	1.98c	0.10	3.29	4.59
Stat		<0.0001	0.49	0.60	<0.0001	0.009	0.22	<0.0001	0.06	0.13	0.11

The quantities of exchangeable elements and the CEC are expressed in cmol of charge per kg of soil. CEC: cation exchange capacity. The data presented are mean values of 3 replicates. Different letters (a, b, c) indicated significant differences between treatments calculated for the sampling times T1 and T3 separately, according to a one-factor ANOVA analysis followed by a Tukey test (P < 0.05). Significantly higher values were indicated in bold. For legibility reasons, the standard error values are not presented.