Tis paper deals with the results of investigations over the transformation of physical and chemical properties of soil fertility and total humus under systematic long-term application of organic and mineral fertilizers and suspending of the inclusion in the Right-Bank Forest-Steppe field crop...

This paper analyzes the ontological structure of institutional and other social entities in virtual environments. The emphasis is on institutional reality, which consists of entities (objects, events, etc.) like money, contracts, and chess pieces, which are constituted in part through collective...