Wassie Haile, Thongchai Mala, Yongyuth Osotsapar, & Visoot Verasan. (2006). Screening of Ethiopian Traditional Medicinal Herbs for their Nitrification Inhibiting Ability. Agriculture and Natural Resources, 40(1), 74–82. retrieved from https://li01.tci-thaijo.org/index.php/anres/article/view/243507