The 4th International Conference continues the discussion on soil classification issues started in GÃ¶dÃ¶lÅ‘, Hungary (2001), Petrozavodsk, Russia (2004) and Santiago, Chile (2008). Specific attention will be paid to the harmonization of criteria for diagnostic horizons and features of soils in agricultural and urban areas and discussion on development of the concepts of a newly proposed Universal Soil Classification System. The conference is planned to include two and one-half days of oral and poster presentations with a full day tour and field workshop. The International conference is open to all the interested individuals independently of acceptance of their abstracts for oral or poster presentations. The scientific program of the conference would include Opening ceremony, Plenary Session, 6 symposia, half-day Mid-Conference field tour, IUSS Commissions and Working Groups business meetings, day long field trip and workshop, and Closing ceremony. The symposia would include invited keynote lectures, and oral and poster session of voluntary contributions. The conveners of the symposia are responsible for the invitation of keynote speakers, acceptance of abstracts corresponding to their symposium, and for selection of contributions for oral or poster presentation. The plenary session would include only invited lectures; however, voluntary poster presentations on the topic will be accepted.