ABSTRACT
Soil strength is an important soil physical property, with numerous applications to agronomy and engineering. Important agronomic applications are those related to impacts of crusting and compaction on plant growth and agronomic yield. Relevant engineering applications are related to trafficability, draft power required to till the soil for alleviating soil compaction, and soil as a foundation for hydraulic and civil structures (e.g., dams, roads, buildings). For detailed discussions on soil strength, readers are referred to textbooks on soil mechanics (Wu, 1982; Whitlow, 1995; Aysen, 2002; Brown, 2001; NAS, 2002).
