Undari, D., Melati, M., & Kurniawati, A. (2026). Effects of Chicken Manure Dose and Application Timing on the Productivity and Microbiological Safety of Lettuce (Lactuca sativa L.). Journal of Tropical Crop Science, 13(01), 227–240. https://doi.org/10.29244/jtcs.13.01.227-240