Table 3.

Mean values and 95% confidence intervals (C.I.s) are calculated for EFs for each of the five fertiliser types for arable and grassland field types using both arithmetic and Bayesian statistical methods.

		Arithmetic		Bayesian
Fertiliser	n	Mean EF	95% C.I.	Mean EF	95C.I.
All
AN	293	1.11	(0.97–1.24)	1.09	(0.97–1.22)
AN + Inhibitor	38	0.75	(0.49–1.00)	0.79	(0.54–1.16)
CAN	63	1.04	(0.64–1.43)	0.98	(0.74–1.30)
Urea	118	0.58	(0.44–0.72)	0.58	(0.48–0.72)
Urea + Inhibitor	129	0.36	(0.28–0.45)	0.35	(0.29–0.41)
Arable
AN	91	0.61	(0.48–0.74)	0.60	(0.50–0.72)
AN + Inhibitor	14	0.37	(0.17–0.56)	0.42	(0.22–0.78)
CAN	8	0.42	(0.29–0.55)	0.49	(0.29–0.88)
Urea	28	0.51	(0.30–0.72)	0.74	(0.38–1.38)
Urea + Inhibitor	30	0.46	(0.26–0.65)	0.47	(0.32–0.71)
Grass
AN	202	1.33	(1.16–1.50)	1.34	(1.18–1.52)
AN + Inhibitor	24	0.97	(0.60–1.33)	1.16	(0.71–1.95)
CAN	55	1.13	(0.68–1.57)	1.11	(0.81–1.51)
Urea	90	0.60	(0.43–0.77)	0.58	(0.47–0.72)
Urea + Inhibitor	99	0.34	(0.24–0.44)	0.32	(0.27–0.39)