Effect of Soil Properties on Growth of Quercus ilex L. in Humid and Cold Mountains of Morocco

Table 4

Chemical characteristics of soils.

	Water pH	N (mg·g^−1)	TOC (%)	C/N (%/%)	OM (%)	Limestone (mg·g^−1)	Soil color
Zerrouka (a)	8.13^a ± 0.34	12.16^a ± 0.41	2.4 ± 0.24	1.98^a ± 0.23	4.13 ± 0.41	171.79^a ± 42.38	Ivory black
Zerrouka (b)	7.85^a ± 0.13	7.96^b ± 0.76	2.24 ± 0.18	2.85^b ± 0.5	3.85 ± 0.31	31.23^b ± 28.47	Burnt umber
Ras el ma	7.71^a ± 0.27	3.96^c ± 0.13	0.56 ± 0.14	1.4^a ± 0.30	0.96 ± 0.24	504.70^c ± 42.38	Burnt sienna

Values marked with different letters indicate a significant difference (, n = 3). The absence of letter indicates that the soil traits do not follow a normal law. N: total nitrogen content of the soil; TOC: total organic soil carbon; C/N: C/N ratio; OM: content of organic matter in the soil.