Hydrogels in Agriculture

This engaging three-part lesson series introduces students to hydrogels and explores how polymer science is being applied to address real-world challenges in agriculture. In Lesson 1, students investigate the process of spherification by creating edible liquid-filled spheres, providing a hands-on introduction to polymers and crosslinking. Lesson 2 connects this chemistry to agriculture as students examine how hydrogels are used in soils to improve water retention, enhance irrigation efficiency, and support plant growth during dry conditions. In Lesson 3, students take on the role of agricultural researchers by designing and testing their own hydrogel formulations to determine which combinations of polymers can absorb and retain the greatest amount of water. Through experimentation, data collection, and analysis, students discover how advances in materials science can help farmers conserve water and improve crop production.