Table 3. Main chemical characteristics of the soil at depths of 0–30 cm and 30–60 cm. [N, Nitrogen; P, Phosphorus; K, potassium; Mg, magnesium; Na, sodium].

Depths (cm)	Cations (kg ha−1)
	N	P	K	Mg	Ca	Na
0–30	1.78**	00	3.32*	4.26**	2.18*	17.21**
30–60	0.79	0.0	2.17	2.85	1.82	15.85

Note:

Asterisks (* and **) represent significant difference Student t-test at p < 0.05 and p < 0.001, respectively.