Sigiro, Yescenia, Eki Monalisa Br Surbakti, Siska Lumban Batu, Yohanna Sitanggang, Cristina Martalia Sitepu, and Evi Syuriani Harahap. “The Effect of Production Input on Corn Farmers’ Income Growth in Karo Land.”. Edumaspul: Jurnal Pendidikan 9, no. 2 (October 1, 2025): 1211-1219. Accessed January 23, 2026. https://jurnal.unimen.cloud/maspuljr/article/view/9149.