Abstract
The addition of manure, gypsum, and dolomite as improvers of the organic matter, calcium (Ca), and magnesium (Mg) levels in the soils has been tested in a greenhouse experiment in order to enhance results obtained from strawberry cultivation in the southwest of Spain. The manure addition resulted in a significant increase in the Ca content in plants and decreased potassium (K). These effects were more pronounced when gypsum and dolomite were supplied together with the manure. The vitamin C content in the fruits was higher when manure was applied to the soil, whereas the reducing sugar levels in the fruits decreased.