TABLE OF CONTENTS

ACKNOWLEDGMENTS

LIST OF TABLES

LIST OF FIGURES

ABSTRACT

CHAPTERS

1 INTRODUCTION

2 LITERATURE

Expert Systems
Knowledge Acquisition
Knowledge Representation
Verification
Validation
Testing Expert Systems
Crop Nutrition
Carambola Nutrition
Lychee Nutrition
Papaya Nutrition

3 DEVELOPING THE EXPERT DIAGNOSTIC SYSTEMS

Introduction
Materials and Methods
Knowledge Acquisition
Knowledge Representation
User Interface Design
Validation
Verification
Testing
Results and Discussion
System Design
CIT·Xpert System Testing
Computer Experience
Hands-on Evaluation
Interface Design/Ease of Use
Content of CIT·Xpert Diagnostic System
TFRUIT·Xpert System Testing
Commercial Growers
County Extension Agents
Experts
Interface Design/Ease of Use
Content of TFRUIT·Xpert Diagnostic System

4 IDENTIFYING TROPICAL FRUIT NUTRIENT DEFICIENCIES

Introduction
Materials and Methods
Results and Discussion

5 SUMMARY AND CONCLUSIONS

APPENDICES

A CIT·XPERT INTERFACE: REGIONS OF CITRUS TREE

B CIT·XPERT INTERFACE: TRUNK

C CITRUS LEAFMINER SUMMARY DOCUMENT

D CIT·XPERT INTERFACE: WELCOME SCREEN

E CITRUS EVALUATION QUESTIONNAIRE

F CIT·XPERT INTERFACE: LEAF SYMPTOM CLASSES

G CIT·XPERT INTERFACE: SPECIFIC LEAF SYMPTOMS

H VISUAL SYMPTOMS OF CITRUS LEAFMINER DAMAGE

I CIT·XPERT INTERFACE: SEARCH QUERY CONCLUSION

J IFAS EXTENSION PUBLICATION: CITRUS LEAFMINER

REFERENCES

BIOGRAPHICAL SKETCH