A few clear differences between the two landscapes emerged: forest plots
in the clay Acrisol soil had higher extractable P and exchangeable Fe in
the top 0.5 m, as well as higher base saturation, extractable P, and exchangeable
Ca in the lower depth intervals than in the loam Acrisol
soil (P ≤ 0.001 to 0.09; Tables A.3 and A.4). Soil pH and exchangeable
Na in the bottom depths (1.0–2.0 m) of the forest sites were higher in
the loam than clay Acrisol soils (P ≤ 0.002 to 0.09; Tables A.3 and A.4).
Differences in many soil biochemical characteristics (Table A.3) and
nutrient stocks (Table A.4) between landscapeswere clearer for the jungle
rubber. In each depth interval, ECEC and exchangeable Al and Fe
were higher in the clay than the loam Acrisol soils (P ≤ 0.05 to 0.09; Tables
A.3 and A.4). In the top depth (0–0.5 m) total N and exchangeable
Ca,Mg and K were higher in the clay than loam Acrisol soils (P ≤ 0.02 to
0.06; Table A.4) and in the lower depths (1.0–2.0m) SOC and exchangeable
Ca, Mg, Mn and K were higher in the clay than loam Acrisol soils
(P ≤ 0.01 to 0.09; Tables A.3 and A.4). Soil pH was higher in the loam
than clay Acrisol soils at depths 0.5–1.0 m and 1.5–2.0 m (P ≤ 0.02;
Table A.3).