Abstract

On the book market can now be found the new book of Prof. D.Sc. Ts. Davidkov. It is a large-scale work with many addressees and is a natural continuation of other significant researches of the author. Studies on crops are main line in his research interests and activities. The work presented in book are based on a solid empirical data base. This fact, as well as the precise processing and interpretation, makes the results reliable and useful.