Table 3 Cassava fertilization effect on CEC, and exchangeable bases (cmol⁺ kg⁻¹) at different sampling periods

3.67^a

2.38^a

0.85^a

0.01^a

0.42^a

4.27^b

3.47^a

1.03^a

0.02^a

0.24^a

4.01^b

3.16^ab

0.91^a

0.02^ab

0.53^a

3.71^a

3.26^a

0.98^a

0.02^a

0.41^a

3.90^ab

3.43^bc

1.00^ab

0.03^ab

0.49^a

3.67^a

3.07^a

0.94^a

0.03^a

0.57^ab

3.88^ab

4.09^c

1.12^b

0.04^b

0.62^a

3.81^a

3.25^a

0.92^a

0.03^a

0.84^b

2.9957

10.15

7.0216

4.0067

0.8062

11.9162

0.5511

1.1580

0.072

7.7144

0.064

< 0.001

0.004

0.028

0.5098

< 0.001

0.6551

0.3583

0.974

0.0024

3.69^a

2.01^a

0.85^a

0.012^a

0.34^a

4.05^b

3.09^b

1.07^b

0.018^a

0.18^a

3.95^a

2.66^b

0.87^ab

0.017^ab

0.39^a

3.90^ab

3.03^ab

0.97^ab

0.019^a

0.37^b

3.85^a

3.19^bc

1.02^b

0.022^ab

0.44^a

3.62^a

2.50^a

0.84^a

0.021^a

0.43^b

3.87^a

3.60^c

1.02^b

0.029^b

0.46^a

3.79^ab

2.84^ab

0.87^a

0.022^a

0.65^c

2.0541

25.3393

5.3156

5.9708

2.942

5.7742

3.7821

7.2504

0.3535

40.253

0.1494

< 0.001

0.0107

0.0069

0.067

0.0079

0.033

0.0031

0.7873

< 0.001

3.38^a

2.41^a

0.93^a

0.026^a

0.55^a

3.81^b

4.24^b

1.34^b

0.032^a

0.23^a

3.76^b

3.52^b

1.04^ab

0.033^ab

0.59^a

3.67^b

3.94^ab

1.10^ab

0.038^a

0.54^b

3.67^b

4.15^c

1.18^ab

0.039^bc

0.62^a

3.36^a

3.58^a

1.00^a

0.038^a

0.70^bc

3.69^b

5.43^d

1.28^b

0.048^c

0.69^a

3.65^b

3.77^ab

0.99^a

0.040^a

0.97^c

9.1877

90.315

4.4782

9.4235

0.7512

11.7613

4.514

5.0395

1.0404

20.2483

0.001

< 0.001

0.0195

< 0.001

0.5385

< 0.001

0.019

0.013

0.4031

< 0.001