Improving Phosphorus Availability in an Acid Soil Using Organic Amendments Produced from Agroindustrial Wastes

Table 4

Effects of organic amendments and incubation time on the soil pH, exchangeable acidity, exchangeable Al, exchangeable Fe, and exchangeable Ca.

Treatments	pH	Exchangeable acidity	Exchangeable Al	Exchangeable Fe	Exchangeable Ca
		cmol kg^−1
30 DAI
T0	5.09±0.5^e	0.67±0.1^a	0.22±0.05^a	0.3±0.1^e	0.03±0.01^e
T1	5.34±0.3^d	0.34±0.1^c	0.1±0.02^b	2.27±0.2^b	4.35±0.2^d
T2	5.69±0.5^c	0.41±0.1^b	Trace	1.14±0.2^c	6.21±0.2^b
T3	6.18±0.5^b	0.19±0.05^d	Trace	2.67±0.25^a	5.28±0.2^c
T4	6.68±0.5^a	0.19±0.06^d	Trace	0.96±0.2^d	7.15±0.3^a
60 DAI
T0	4.29±0.5^e	0.9±0.1^a	0.22±0.05^a	0.26±0.1^e	0.03±0.1^e
T1	5.63±0.4^d	0.37±0.1^c	0.06±0.02^b	2.26±0.2^b	4.13±0.2^d
T2	5.87±0.5^c	0.29±0.1^b	Trace	0.21±0.2^c	6.3±0.2^b
T3	6.24±0.4^b	0.19±0.05^d	Trace	2.35±0.3^a	5.22±0.2^c
T4	6.69±0.4^a	0.22±0.05^d	Trace	0.96±0.2^d	6.61±0.3^a
90 DAI
T0	4.33±0.5^e	0.89±0.1^a	0.22±0.05^a	0.25±0.1^e	0.03±0.1^e
T1	5.54±0.4^d	0.37±0.1^c	0.05±0.02^b	2.22±0.2^b	4.17±0.2^d
T2	6.79±0.5^c	0.25±0.1^b	Trace	0.23±0.2^c	6.46±0.2^b
T3	6.35±0.3^b	0.19±0.04^d	Trace	2.33±0.3^a	5.63±0.3^c
T4	6.63±0.3^a	0.16±0.04^d	Trace	0.89±0.2^d	6.45±0.3^a

Means within column with different letter(s) indicate significant difference between treatments by Tukey’s test at 𝑃≤0.05.