Long and Midterm Effect of Conservation Agriculture on Soil Properties in Dry Areas of Morocco

Table 3

Tillage effect on SOM content (mean ± standard deviation).

Field	Soil depth (cm)	Organic matter content (g·Kg^−1)		CT to NT % SOM change
		NT	CT
Site I	0–10			30
	10–20	19.11 ± 0.03a	17.38 ± 0.12a	10
	20–40	17.23 ± 0.10a	16.43 ± 0.05a	5
	40–60	15.80 ± 0.04a	15.36 ± 0.03a	3
Site II	0–2.5	19.12 ± 0.47a	13.02 ± 0.21b	47
	2.5–5	15.38 ± 0.27a	10.74 ± 0.14b	44
	5–10	15.62 ± 0.06a	10.06 ± 0.17b	54
	0–10	16.44 ± 0.22a	10.97 ± 0.17b	50
	10–20	12.68 ± 0.06a	9.42 ± 0.10b	35
	20–30	12.48 ± 0.09a	9.58 ± 0.10b	30
	30–40	13.22 ± 0.17a	9.80 ± 0.10b	35
	40–60	11.18 ± 0.06a	9.440 ± 0.17a	19
	60–80	10.20 ± 0.10a	12.94 ± 0.22a	−21

the same row, the values followed by different letters are significantly different within each study site according to Student’s test ().