Two types of soil samples (silt-loam and clay) were tested. Because a previous study speculated that penetration depth could confound the CI measured, two depthdependent factors were incorporated into each CI-model for validating this speculation.
Two types of soil samples (silt-loam and clay) were tested. Because aprevious study speculated that penetration depth could confound the CI measured, two depthdependentfactors were incorporated into each CI-model for validating this speculation.