Research Article

Extractable Al and Soil Solution Ionic Concentrations in Strongly Leached Soils from Northwest Iberia: Effects of Liming

Table 5

Total concentration of calcium (Ca+2), magnesium (Mg+2), potassium (K+), and sodium (Na+) ions in unlimed (control) and limed studied soil solutions as determined by inductively coupled plasma atomic emission spectrometry. Means in the same horizon followed by different letters in column are significant at 𝑃 < 0 . 0 5 by the Tukey test.

PedonHorizonCaCO3 addedCa+2Mg+2K+Na+
(t ha−1)(μM L−1)

Umbrisols
1Ah1095.8a8.2a2450.3a87.4a
2137.7b17.3b3522.4b90.0b
4148.7b27.9b3803.1b107.4b
6154.2b48.6c3943.5b200.9c

3Ah1060.9a8.2a1556.9a105.7a
261.9a9.1b1582.5a118.8a
481.8b9.9b2093.0b134.8b
699.8c130.0c2552.4b303.6c

4Ah1024.5a1.6a625.3a31.3a
232.9b3.3b842.3a60.9b
459.9c6.6c1531.5b86.6c
667.4d59.3d1722.9b108.3d

Cambisols
5Ah030.9a6.6a791.3a50.9a
261.4b14.8b1569.8b127.0b
4225.1c15.6c5755.8c136.1b
6366.3d83.9d9367.5d166.2c

6Ah1032.9a4.9a842.3a58.3a
275.3b9.1b1927.1b91.8b
493.3c11.5b2386.5c133.9b
6154.7d60.9c3956.3d141.4c

Luvisols
7Ah0157.2a23.9a4020.1a148.8a
2895.2b25.5a22895.4b150.1a
4897.2b35.5b22946.4b156.2a
6962.1c94.7c24605.0b190.1b

8Bt069.4a15.6a1773.9a89.2a
282.8a24.7b2118.5b118.3b
4197.6b27.9b5053.8c142.2c
6546.4c31.2c13974.6d280.9d

Regosols
10Ah038.4a10.7a982.7a67.9a
2123.8b15.6a3165.0b116.1b
4174.4c24.7b4901.6c136.6c
6232.0d110.3c5934.4d151.8d

11Ah082.8a10.7a2118.5a194.9a
286.8a11.5a2220.6a203.6b
4163.2b13.2a4173.2b207.5b
6434.1c149.8b11103.1c309.7c