4Metale w nawozach

TABLE 9.6 Levels of the Heavy Elements in Primary Sources Added to Agriculture Land (in jig g"¹)

M	Phosphate* fertilizer	Nitrogen fertilizer	Limestone	Sewage sludge	Manure	Irrigation water**	Pesti- cides^I
As	<1-1200	2-120	0.1-24	2-30	<1-25	<10	3-30
Bi				<1-100
Cd	0.1-190	<0.1-9	<0.05-0.1	2-3000	<0.1-0.8	<0.05
Hg	0.01-2	0.3-3		<1-56	<0.01-0.2		0.6-6
In					1.4
Pb	4-1000	2-120	20-1250	2-7000	0.4-16	<20	11-26
Sb	<1-10			2-44	<0.1-0.5
Se	0.5-25		<0.1	1-17	0.2-2.4	<0.05
Te	20-23				0.2

*Commercial phosphates or phosphorites (phosphate rock), ** water ąuality criteria for short term use, 1 % element in pesticide. Sources; references 2,17,20,21,25,42,54, 57,84,93,98,100.

Distance from the road (m)

Fig. 9.14 Lead in §oil close to a busy road and in ręlation to depth.

Fig. 9.15 Lead concentration in a soil profile in ręlation to the sampling interval. Source of data; Banin et al., 1987 [10].

Lead concentration (/*g g’¹)