Impact of No-Tillage and Conventional Tillage Systems on Soil Microbial Communities

Table 2

Total PLFAs and phosphatase^† activities in no-till (NT) and conventional-till (CT) soils*.

Tillage treatment	Depth (cm)	Total PLFAs (nmol g^−1)	Acid P	Alk P	PDE
			(μg of p-nitrophenol g^−1 hr^−1)
NT	0–5	104a	367a	321a	132a
NT	5–15	38b	307ab	44c	36b
CT	0–5	39b	200b	89b	32b
CT	5–15	30c	202b	87b	34b

^†Acid P, acid phosphatase; Alk P, alkaline phosphatase; PDE, phosphodiesterase.
*Means (𝑛=4) followed by the same letter in a column are not significantly different (Tukey, 𝑃≤0.05).