Thiyagarajan, R., Jayashree, G., Mohankumar, A., & Vijayakumary, P. (2013). Performance evaluation of cone penetrometer device for measuring the subsoil compaction in mulched plots. International Journal of Agricultural and Biological Engineering, 6(3), 19–27. Retrieved from https://www.ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/707