Ecological and Bioengineering Studies for Stabilizing the Wad Medani-Sennar Roadside Slope Linking the Gezira and Sennar States

Table 1

Soil separated grain size and limits according to UCS, USDA, and AASHTO specifications.

Grain type	Gravel (mm)	Sand (mm)	Silt (mm)	Clay (mm)
Unified Soil Classification System	76.2–4.75	4.75–0.075	Fine silt and clay <0.075
US Dept. of Agriculture (USDA)	>2	2–0.05	0.05–0.002	<0.002
AASHTO	75–2	2–0.05	0.05–0.002	—