Table 9
Soil mineral nitrogen (mg kg−1) as influenced by organic waste application (average ± standard deviation)
Treatments	First crop (wheat)	Second crop (guar)	Third crop (wheat)
NH4+-N
C	66.67e ± 0.10	49.15f ± 0.57	48.07f ± 0.12
CR	66.67e ± 0. 10	55.05d ± 0. 13	75.30c ± 0. 08
H	68.17d ± 0.17	50.00e ± 0.16	56.75e ± 0.06
SS	76.90c ± 0.08	57.80b ± 0.28	70.52d ± 0.10
RF	87.02b ± 0.13)	56.95c ± 0.17	79.30b ± 0.08
RF + CR	87.22a ± 0.10	60.15a ± 0.24	98.72a ± 0.10
LSD	0.176	0.463	0.136
P≤	0.0001	0.0001	0.0001
Treatments	First crop (wheat)	Second crop (guar)	Third crop (wheat)
NO3−-N
C	33.12d ±0.17	17.85e ± 0.13	16.50f ± 0.08
CR	33.12d ± 0. 26	19.95c ± 0. 19	30.90d ± 0. 08
H	35.15c ± 0.28	18.82d ± 0.10	22.30e ± 0.08
SS	42.20b ± 0.16	22.65b ± 0.51	36.85c ± 0.06
RF	50.10a ± 0.36	19.92c ± 0.15	40.25b ± 0.06
RF + CR	50.22a ± 0.66	24.27a ± 0.21	50.80a ± 0.08
LSD	0.526	0.356	0.121
P≤	0.0001	0.0001	0.0001

Means in columns, within each depth, followed by different letter(s) are significantly different at P ≤ 0.05 using LSD.

Rezig et al. International Journal Of Recycling of Organic Waste in Agriculture 2012 1:1   doi:10.1186/2251-7715-1-1