During recent decades of research by a large group of agricultural scientists
workin in the diagnostic field, many new method have been devised to aid farmers
in fertilizing their crops more effectively. A major objective of this book is
to this book is to bring together in one volume a comprehensive discussion of
both the underlying theory and the practical application of these various
techniques. To attain that objective, the services of a group of distinguished
Scientists were enlisted to prepare the various chapters.
These scientists are outstanding in their respective spheres of work, both as to
theory and as to theory and as to practice.