Meiqing, Li, Li Jinyang, Wei Xinhua, and Zhu Wenjing. “Early Diagnosis and Monitoring of Nitrogen Nutrition Stress in Tomato Leaves Using Electrical Impedance Spectroscopy”. International Journal of Agricultural and Biological Engineering 10, no. 3 (May 31, 2017): 194–205. Accessed February 26, 2026. https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/3188.