The present book, first of its kind, has been written primarily to cover the interests of research scholars working in various Universities and Institutions. It deals with basic concepts of cambial activity and production of vascular tissues in Citrus species. The outline, contents and subject matter of this book has been presented and geared up according to the nitches and needs of scholars. Efforts have been made to include the latest information available.

Moin A. Khan is Assistant Prof. in Agra University and M. B. Siddiqui is Associate Prof. at Aligarh Muslim University. Both had been meritorious student and recieved several awards and Fellowships. They are active member of several scientific societies and published many research papers. They work in fields of Allelopathy and Plant Anatomy.