Runoff and Nutrient Losses from Constructed Soils Amended with Compost

Table 7

Mass runoff loss of total dissolved P (TDP), dissolved reactive P (DRP), NO³-N, and dissolved total Kjeldahl N (TKN) during grass establishment on roadside soils amended with composted dairy manure (CDM) and composted municipal biosolids (CMB) over 10 natural rainfall events. See Table 2 caption for description of treatments.

Treatment	Compost	Rate	TDP		DRP		NO3^−-N		TKN
		(m^3 m^−3)	(mg m^−2)		(mg m^−2)		(mg m^−2)		(mg m^−2)
Control	NA	NA	301	d	165	e	45	b	775	b
CMT	CDM	0.125	450	cd	303	d	86	b	786	b
CMT	CMB	0.125	428	cd	272	de	59	b	815	b
CMT	CDM	0.25	637	c	450	c	140	a	1025	b
CMT	CMB	0.25	440	cd	308	d	78	b	770	b
ECC	CDM	0.50	1845	a	1321	a	75	b	1756	a
ECC	CMB	0.50	1050	b	841	b	71	b	1549	a

^†Different letters in columns represent significant differences using Fisher’s LSD means separation test.