Table 1.
Morphological properties of the North Cameroon vertisols.
| Horizon (depth) | Munsell Colour (dry) |
Structure | Consistency |
Rock fragments | Boundary | Roots | ||
|---|---|---|---|---|---|---|---|---|
| Code | Colour | Dry | Wet | |||||
| A1 (0–30 cm): grey massive blocky horizon | 10YR5/1 | Grey | 3c, abk | h, f | s, p | v | g | c, f |
| B1 (30–100 cm): dark grey massive blocky horizon | 10YR4/1 | Dark grey | 3m, abk | h, f | s, p | n | g | f, f |
| B21 (100–150 cm): dark grey horizon | 10YR4/1 | Dark grey | 3c, abk | h, f | s, p | v | g | - |
| B3g (150–250 cm): very dark grey horizon | 10YR3/1 | Very dark grey | 3c, abk | h, f | s, p | v | - | - |
| Key of properties | |||||||
|---|---|---|---|---|---|---|---|
| Structure |
Consistency |
Rock fragments (%) | Horizon Boundary | Roots | |||
| Size | Type | Grade | Dry | wet | |||
| vf = very fine (G5 mm)f = fine (5–10 mm)m = medium (10–20 mm)c = coarse (20–50mm)vc = very coarse (>50 mm)1 = weak; 2 = moderate; 3 = strong; | g = granular abk = angular blocky sbk = subangular blocky l = lumpy ma = massive |
w = weak (peds barely observable) m = moderate (peds observable) s = strong (peds clearly observable) |
l = loose s = soft h = hard |
s = sticky p = plastic |
n = none (0); v = very few (0–5) c = common (5–15) m = many (15–40) a = abundant (40–80) d = dominant (>80) |
a = abrupt c = clear g = gradual d = diffuse |
f = common; f = few |