. 2012 May 5;367(1593):1235–1244. doi: 10.1098/rstb.2011.0314

Table 1.

Broadbalk soil properties: N144 and N288 plots receive N as ammonium nitrate, FYM receives farmyard manure; arable plots are under continuous wheat cultivation (section 1).

plot	fertilizer		moisture: stones removed (% w/w ± s.e.)^a	od soil bulk density (g cm⁻³)^b	total N: NO₃ + NH₄ 0–23 cm (kg N ha⁻¹ ± s.e.)^a	soil pH in H₂O^b	N (%)^b	organic C (%)^b	C : N
plot	N	other	moisture: stones removed (% w/w ± s.e.)^a	od soil bulk density (g cm⁻³)^b	total N: NO₃ + NH₄ 0–23 cm (kg N ha⁻¹ ± s.e.)^a	soil pH in H₂O^b	N (%)^b	organic C (%)^b	C : N
N0 (plot 05)	nil	PKMg	25 (0.3)	1.2	3.7 (0.2)	8.10	0.094	0.90	9.57
N144 (plot 08)	144 kg ha⁻¹ (April)	PKMg	27 (1.3)	1.2	6.2 (0.5)	7.30	0.112	1.13	10.09
N288 (plot 16)	288 kg ha⁻¹ (April)	PKMg	25 (0.2)	1.2	8.3 (0.5)	7.80	0.122	1.20	9.84
FYM (plot 2.2)	35 t ha⁻¹ (Aug–Sept)	nil	32 (0.6)	1.1	8.1 (0.3)	7.82	0.266	2.83	10.64
woodland (wilderness)	nil	nil	41 (0.6)	0.9	25.0 (0.1)	7.70	0.29	3.45	11.73

^aod, oven dried. Measured at January sampling.

^bData from [13] and P. Poulton (2010, personal communication).