Nutrient Release from Disturbance of Infiltration System Soils during Construction

Table 1

Comparison of silt loam and loamy sand from USDA Soil Survey and analytical testing.

	Silt loam	Loamy sand
USDA Soil Survey Information
Soil pH	4.0–5.0	3.6–5.0
Organic content	1–4%	1–5%
Cation Exchange Capacity [CEC] (meq/100 g)	3.8–8.0	0.6–2.0
Results of soil fertility analysis
Soil pH	O horizon: 4.5	O horizon: 4.7
	AB horizon: 5.7	AB horizon: 4.7
Organic content	O horizon: 5.5%	O horizon: 9.5%
	AB horizon: 1.8%	AB horizon: 1.4%
Cation Exchange Capacity [CEC] (meq/100 g)	O horizon: 19	O horizon: 15
	AB horizon: 12	AB horizon: 11
Total nitrogen (mg/kg)	O horizon: 2,900	O horizon: 4,700
	AB horizon: 1,000	AB horizon: 700
Total phosphorus (mg/kg)	O horizon: 35	O horizon: 16
	AB horizon: 5	AB horizon: 2