Introduction. 1. Statistical Parameters of the Soil Physical Characteristics. 2. Description of the Soil Physical Characteristics by Distribution Functions. 3. Correlation (Regression) Analysis. 4. Determination of the Site and the Number of Soil Tests. 5. Determination of the Qualifying Characteristics of the Soil. 6. Comparison of Tests Performed with the Same Soil. 7. Evaluation of the Test Data before the Planning. 8. Basic Principles of the Planning Based on the Theory of Probability. 9. Determination of the Bearing Capacity of the Soil. 10. The Forecasting of Settlements. 11. The Stability of Free Standing and Supported Slopes. 12. The Quality Control of Earthworks. Notations. References. Appendix. Author Index. Subject Index.