Pre-extension demonstration of black pepper (Piper nigrum Linn.) technologies in selected districts of Ethiopia. International Journal of Agricultural Research, Innovation and Technology, [S. l.], v. 15, n. 1, p. 70–77, 2025. Disponível em: https://ijarit.online/index.php/journal/article/view/178.. Acesso em: 20 may. 2026.