Comparison of the Chemical Properties of Forest Soil from the Silesian Beskid, Poland

Table 1

Average annual loads (kg·ha⁻¹) contributed by the precipitation of SO₄ and (NO₃ + NO₂) in Silesia.

Year	Average annual loads (kg·ha^−1)
	SO4	NO3 + NO2
1999	33.00	4.86
2000	35.93	5.50
2001	33.59	4.96
2002	27.76	3.85
2003	21.20	3.56
2004	24.50	4.00
2005	23.00	4.40
2006	20.25	3.60
2007	25.13	4.06
2008	20.42	3.61
2009	22.33	3.73
2010	23.63	4.16
2011	19.25	3.43
2012	17.70	3.39