Long-Term Field Experiments as a Foundation for Conserving and Enhancing Soil Fertility

Long-term field experiments have been maintained by the Nicolae Dimo Institute of Pedology, Agrochemistry and Soil Protection for some 50 years. The long-term experiments on Grey forest soil (Phaeozem), Leached chernozem and Carbonate chernozem (Haplic and Calcic chernozem) that are now included in the EuroSOMNET Information Research System 2000 lend insights to the quality of arable soils under systematic application of fertilizers and support practical recommendations for soil management. Keys to this information are presented. Long-term field experiments should be continued in order to obtain new information on the optimization of soil properties, management regimes and increasing fertility by means of agro-technical and agrochemical measures.