Bologna is home to numerous prestigious cultural, economic and political institutions as well as one of the most impressive trade fair districts in Europe. In 2000 it was declared European capital of culture and in 2006, a UNESCO âcity of musicâ.ologna is also one of the wealthiest cities in Italy, often ranking as one of the top cities in terms of quality of life in the country: in 2011 it ranked 1st out of 107 Italian cities.
Add topsoil to achieve a total topsoil depth of 10-15 cm (4-6 inches), after firming. The topsoil should be a loamy sand, sandy loam, clay loam, loam, silt loam, sandy clay loam or other soil suitable for the area.
Large quantities of soil are usually sold by the cubic yard. One cubic yard spread out 1 inch thick covers about 324 square feet. To cover 500 square feet with three inches of soil, you'll need 4.52 cubic yards. Typically lower-quality topsoil is at the lower end of the scale, and the more yards you order the less it will cost per cubic yard. 2  Topsoil is also sold in bags, at $2-$5 a bag. 3  It takes roughly 18-20 bags to make a cubic yard, or $36-$100.