Oil palm (Elaeis guineensis Jacq.) genetic differences in mineral nutrition: potassium and magnesium effects on morphological characteristics of four oil palm progenies in Nigeria (West Africa) | OCL

Palm and palm oil / Palmier et huile de palme

Open Access

Table 2

Physico-chemical soil characteristics at the onset of the Nigerian trials.

Site	Horizon (cm)	Granulometry				Acidity			Organic matter				P content		(Cations) Exchange Complex contents
		Clay (%)	Slit (%)		Fine sand (%)	Coarse sand (%)	pH water	pH co	Organic matter (%)	Organic carbon (%)	Total N (‰)	C/N	Total P (mg/kg)	Available P (mg/kg)	Ca²⁺ (me/100 g)	Mg²⁺ (me/100 g)	K⁺ (me/100 g)	Na⁺ (me/100 g)	Al³⁺ (me/100 g)	S (Ca. Mg. K. Na) (me/100 g)	CEC (me/100 g)	TS (%)
			Fine	Coarse
Nigerian	0–20	12.33	1.69	1.11	13.79	71.1	5.47	4.31	1.57	0.91	0.65	13.93	125	2.9	1.54	0.37	0.09	0.03	0.04	2.04	2.34	86.88
	20–70	14.3	1.89	1.17	13.46	69.19	4.95	4.12	0.74	0.43	0.29	14.84	122.5	1.7	0.5	0.16	0.05	0.04	0.41	0.74	1.53	49.11
	70–95	21.98	1.67	0.72	11.27	64.37	4.78	4.08	0.52	0.3	0.23	13.24	145	1.2	0.27	0.08	0.04	0.04	0.67	0.43	1.5	27.39
	95–150	25.32	1.59	1.12	12.71	59.28	4.65	4.01	0.39	0.23	0.2	11.51	147.5	1.1	0.19	0.06	0.04	0.03	0.88	0.32	1.59	19.5

N: nitrogen; C: carbon; P: phosphorus; Al: aluminium; Na: sodium; Ca: calcium; Mg: magnesium; S: base ion (cation) sum; CEC: cation exchange capacity; TS: saturation rate; pHco: pH cobalt (soil acidity assessed using the cobaltihexamine method).

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