Trace Element Soil Quality Status of Mt. Cameroon Soils

Table 4

Heavy metal concentration (mg kg⁻¹) in common fertilizer constituents concentration [25].

Element	Phosphate	Potassium	Farmyard
Cd	9–30	7–15	0.3–1.8
Cr (T)	1000	1000	12
Ni	300	80	17
Zn	5–1450	—	15–250