Evaluation of pulverized egg shell as an additive/supplemental fertilizer for the growth of lettuce (Lactuca sativa L. through hydroponic system - Baniaga, Jo Maica R. (MMSU City of Batac, 2022)
Thesis (BS in Agricultural and Biosystems Engineering) - Mariano Marcos State University -- College of Engineering, City of Batac, 2022.
Bibliography: leaves 48-50