Yes, your shed does need a base. This is to give it a solid, level foundation. Open soil will not help with the longevity of the shed itself or the contents within. The best materials to use to make your shed base are concrete, natural stone or wood.
Faringdon
Faringdon is a historic market community in the Vale of White Horse, Oxfordshire, England. Within the historical limits of Berkshire, it is 18 miles (29 kilometres) south-west of Oxford, 10 miles (16 kilometres) north-west of Wantage as well as 12 miles (19 kilometres) east-north-east of Swindon. It is a big church, its lowest parts including the River Thames in the north and its greatest ground getting to the Ridgeway in the south. Faringdon was the western community in Berkshire until the 1974 boundary adjustments moved it to Oxfordshire. The civil parish is officially Fantastic Faringdon to identify it from Little Faringdon in West Oxfordshire. The 2011 Census offered a population of 7,121. On 1 February 2004, Faringdon was provided Fairtrade Town status, as the initial Fairtrade Town in South East England. It is the base for Faringdon Enterprise Gateway, which assists and suggests businesses in country west Oxfordshire.