Table 10. Relative distribution of nutrients between the common soil nutrient storage pools for an oak woodland ecosystem in the foothills of the Western Sierra Nevada, northern California.

Nutrient/Pool	Ca	Mg	K	N	P
	kg/ha
Soil solution	16	4.3	8	0.2	0.018
Exchange/sorption	31,900	8,000	1,105	10	135
Organic matter	2,337	1,440	1,168	10,700	4,400
Primary minerals	789,700	488,100	46,700	0	10,500

(*) Data from Dahlgren and Singer (1994)