Riantara, Hylda, AND 		Mandala, Marga.
" Soil chemical properties of suboptimal dryland in subdistricts of Panji, Kendit, and Kapongan Situbondo Regency for development of cassava (Manihot utilissima L.) cultivation" <em>Journal of Tropical Industrial Agriculture and Rural Development</em> [Online], Volume 1 Number 1 (10 June 2020)