Soj
Sozh River deposits that extend into Smolensk Oblast providing a supply of ground phosphate to Krichev and Klimovichi rock plants. Phosphorite is found along the river between Mstislavl and Krichev. Many other construction materials, such as chalk, clay, sand, and gravel are also distributed in the river region as are many mineral water springs. The Sozh is one of the two chief rivers of Mogilev in the Smolensk Oblast where the trade in the early part of the 20th century, involving primarily paper, oil, wire nails, flour, glass, and matches, was predominantly in the hands of the large Jewish population.