Soudi, B., Sbai, A., & Chiang, CN. (1990). Nitrogen Mineralization in Semiarid Soils of Morocco - Rate-constant Variation With Depth. Soil Science Society of America Journal, 54(3), 756-761. https://doi.org/10.2136/sssaj1990.03615995005400030022x (Original work published 1990)