Table 1.

Parameters used to calculate the carbon and nutrient contribution from manures.

Parameters	Dairy	Beef	Sheep	Pig	Poultry	Reference
Manure (dung and urine) deposition
Frequency of deposition of dung, (month−1)	360	300	660	−	−	(Lantinga et al., 1987; McGechan and Topp, 2004; Orr et al., 2014; Williams and Haynes, 1995)
Frequency of deposition of urine, (month−1)	360	258	510	−	−	(Lantinga et al., 1987; McGechan and Topp, 2004; Rosen et al., 2004; Wheeler, 1959)
Carbon deposited, (g C event−1)	90	106	14	−	−	(Orr et al., 2014; Whitehead, 1995; Williams and Haynes, 1995)
Organic-N deposited, (g C event−1)	0.32	0.83	0.19	−	−	Whitehead (1995)
Organic-N deposited, (g N event−1)	1.07	3.88	0.55	−	−	(Lantinga et al., 1987; Sakadevan et al., 1993)
NH4-N deposited, (g N event−1)	0.01	0.03	0.003	−	−	(Sakadevan et al., 1993; Whitehead, 1995)
NH4-N deposited, (g N event−1)	6.07	11.07	0.05	−	−	(Lantinga et al., 1987; Sakadevan et al., 1993; Whitehead, 1995)
Total-P deposited, (g P event−1)	1.40	0.01	0.21	−	−	(Haynes and Williams, 1993; Orr et al., 2014; Williams and Haynes, 1995)
Total-P deposited, (g P event−1)	0.00	1.20	0.00	−	−	(Manston and Vagg, 2009; Orr et al., 2014; Shand et al., 2002)
Slurry
Volume, (m3 month−1)	1.5	0.90	−	0.15	−	DEFRA (2011a)
Volume fraction of dry matter, (m3 m−3)	0.06	0.06	−	0.04	−	DEFRA (2010)
Density, (g m−3)	1,040,000	1,040,000	−	800,000	−
Carbon concentration, (g C g−1 DM)	0.20	0.20	−	0.2	−	MAFF (1998)
Organic-N concentration, (g N m−3)	1900	2300	−	1300	−	ADAS (2007)
NH4 = N concentration, (g N m−3)	1300	2000	−	2300	−	ADAS (2007)
Total-P concentration, (g P m−3)	622	933	−	0.025	−	ADAS (2007)
Poultry manure
Dry matter, (g DM month−1)	−	−	−	−	2.5	DEFRA (2011a)
Carbon concentration, (g C g−1 DM)	−	−	−	−	0.24	MAFF (1998)
Total-N, (g N month−1)	−	−	−	−	0.048	Nicholson et al. (1996)
Total-P, (g P g−1 DM)	−	−	−	−	0.015	Nicholson et al. (1996)