The following are the various methods used in soil exploration: 1. Test Pits or Trial Pits (for Shallow Depths) 2. Auger Boring (for Shallow or Large Depths). 3. Wash Boring. 4. Percussion Drilling. 5. Rotary Boring. Method # 1. Tests Pits: Trial pits are a simple and economical method of soil exploration to shallow depths. […]