Tree fruit production and the associated areas of science and technology have undergone momentous transformations in recent years. Growers are adopting new cultivars, planting systems, integrated management programs, and fruit storage and marketing practices. The changes have resulted in an intensified need to increase basic and applied knowledge of fruit physiology and culture. A commitment to lifelong learning is essential for those who want to succeed in this field.

The Concise Encyclopedia ofTemperate Tree Fruit is addressed to individuals who aspire to learn more about both the science and art of tree fruit culture. All aspects of pomology are covered, ranging from the critically important but often overlooked topic of site selection and preparation to the role of biotechnology in breeding programs. We recognize that it is difficult in a book of this breadth to adequately discuss minor crops, and thus the emphasis is on the primary tree fruit crops of the temperate zone.

To facilitate use, topics are listed alphabetically and covered in sufficient detail to provide the reader with the most significant and current information available. Related topics and selected references are provided at the end of each section for those who desire to explore a subject in greater depth. As with any concise reference book, the objective has been to make the subject matter comprehensive yet succinct.

We thank the group of outstanding contributors who made this project possible. Each is recognized as an authority in a particular research area and enthusiastically contributed his or her knowledge to making this a fine encyclopedia. We also extend appreciation to Susan Schadt and John Armstrong for their assistance with illustrations, Martin Goffinet for reviewing the text on anatomy and taxonomy, and the many educators and industry professionals who provided figures or information for tables. Finally, we acknowledge our grandfa thers for nurturing our interests in horticulture. They were dedicated orchardists who served as teachers and mentors during our formative years. It was this common background that fostered the beginning of a valued professional relationship between the two of us.

One of the greatest rewards of a vocation in pomology is working with individuals who are genuinely committed to finding novel ways to modernize agriculture, improve human nutrition, and safeguard farmlands. We offer this book as a tribute to the students, growers, and scientists whose collaborative efforts lead to advancements in feeding and sustaining our world.

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