Land Application of Biosolids in the USA: A Review

Table 2

Means and variability of nutrient concentrations^a in biosolids collected and analyzed in Pennsylvania between 1993 and 1997 [12].

Nutrient	Total Kjeldahl N; (%)	NH4-N; (%)	Organic N; (%)	Total P; (%)	Total K; (%)
Mean	4.74	0.57	4.13	2.27	0.31
Standard deviation	1.08	0.30	1.03	0.89	0.27

^aConcentrations are on a dried solids basis.