Table 10
Soil total nitrogen (g kg−1) as influenced by organic waste application (average ± standard deviation)
Treatments	First crop (wheat)	Second crop (guar)	Third crop (wheat)
0 to 20 cm
C	0.26c ± 0.01	0.21e ± 0.01	0.19f ± 0.01
CR	0.25c ± 0. 01	0.29c ± 0. 01	0.34c ± 0. 01
H	0.25c ± 0.01	0.23d ± 0.01	0.21e ± 0.01
SS	0.32a ± 0.01	0.34b ± 0.01	0.36b ± 0.01
RF	0.28b ± 0.01	0.30c ± 0.01	0.30d ± 0.01
RF + CR	0.28b ± 0.01	0.35a ± 0.01	0.39a ± 0.01
LSD	0.017	0.012	0.012
P≤	0.0001	0.0001	0.0001
Treatments	First crop (wheat)	Second crop (guar)	Third crop (wheat)
20 to 40 cm
C	0.22c ± 0.01	0.18d ± 0.01	0.17c ± 0.01
CR	0.22c ± 0. 01	0.23c ± 0. 01	0.26b ± 0. 01
H	0.22c ± 0.01	0.19d ± 0.01	0.18c ± 0.01
SS	0.28a ± 0.01	0.31a ± 0.01	0.32a ± 0.01
RF	0.24b ± 0.01	0.25b ± 0.01	0.26b ± 0.01
RF + CR	0.23bc ± 0.01	0.31a ± 0.01	0.33a ± 0.01
LSD	0.017	0.011	0.014
P ≤	0.0001	0.0001	0.0001

Means in columns, within each depth, followed by different letters 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