Leaf Sampling (Quince Tree Leaf: Cydonia Oblonga Miller)

Abstract

This study was conducted with first-year students of the Laboratory Technology Program at
Uşak University, Banaz Vocational School of Higher Education, within the scope of the “Sampling
Methods” course. The main aim of the activity was to demonstrate the importance of correct and reliable
sampling practices in agricultural and laboratory applications through hands-on leaf sampling from quince
(Cydonia oblonga) trees. During the practical session, students learned how to select, collect, label, and
transport leaf samples properly, in accordance with the principles outlined in ISO/IEC 17025 related to the
sampling process. The activity not only enhanced students’ technical skills but also provided a strong
connection between theoretical knowledge and real-world laboratory applications. Feedback from
participants indicated that the exercise increased their motivation, deepened their understanding of
sampling techniques, and improved the overall efficiency of the course. Furthermore, the experience
fostered awareness of quality assurance, traceability, and sustainable agricultural practices, aligning with
the United Nations Sustainable Development Goals (SDGs)—particularly Goal 4 (Quality Education), Goal
12 (Responsible Consumption and Production), and Goal 15 (Life on Land). In conclusion, this study
demonstrated that integrating applied sampling activities into laboratory education significantly improves
student engagement and understanding while promoting environmentally responsible practices. Such
training contributes to the development of competent, quality-oriented, and sustainability-conscious
laboratory professionals prepared to meet the needs of modern scientific and industrial fields.