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.
6. Multiply the square footage of the lawn by the depth of topsoil to arrive at the amount of topsoil in square feet. Using the above figures as an example, the calculation appears as follows: 10,000 x 0.33 = 3,300 cubic feet of topsoil.Divide the cubic feet of the plot by 27, as 27 feet comprise 1 cubic yard.. Multiply the square footage of the lawn by the depth of topsoil to arrive at the amount of topsoil in square feet. Using the above figures as an example, the calculation appears as follows: 10,000 x 0.33 = 3,300 cubic feet of topsoil.