Figures & data
Figure 1. Topography (top panel) and soil profiles (bottom panel) on the line transect.
Soil profiles were surveyed with a 1 m-long hand auger. Soil color was recorded in the moist condition using the Munsell Soil Color Charts.
Table 1. Summary of morphological properties of the soils from four groups.
Table 2. Physical properties of the soil from each of the four groups.
Table 3. Chemical properties of the soils from four groups.
Figure 2. Grain yield in each group.
LX-fr: Ferric Lixisols; PT-pt: Petric Plinthosols; PT-pt.px: Pisoplinthic Petric Plinthosols. Mean values with different letters are significantly different (P < 0.05).
Figure 3. Relationship between effective soil depth and grain yield.
Effective soil depth is defined as a soil thickness overlying a petroplinthic horizon.
Figure 4. Relationship between predicted and observed effective soil depth.
Effective soil depth is defined as a soil thickness overlying a petroplinthic horizon.
