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Fresno, Ca

Need help analyzing some commercial compost. Mostly to make sure the levels aren't out of whack... toxic. I know these questions come up quite often, it would be nice if someone wrote an article that gave max/min levels and things to watch out for. Thanks in advance for your help

Dry Wt. Basis

Total N 1.5%
Ammonia 5 mg/kg
Nitrate 128 mg/kg
Organic N 1.4%
Phosphorus (P2O5) .51%
Phosphorus (P) 2233 mg/kg
Potassium (K2O) 5.6%
Calcium (Ca) 2.0%
Magnesium (Mg) .52%
Sulfate (SO4) 43044 mg/kg
Copper (Cu) 36 mg/kg
Zinc (Zn) 109 mg/kg
Iron (Fe) 6734 mg/kg
Manganese (Mn) 193 mg/kg
Boron (B) 21 mg/kg
Sodium (Na) .1 %
Chloride (Cl) .13 %
pH 7.28 (wet wt. basis)
Carbonates (CaCO3) 12 lb/ton
Organic Matter 36.3 %
Organic Carbon 17.9 %
Ash 63.7 %
C/N Ratio 12

2/21/2008 6:08:40 PM