Miressa Duffera Hong, N., White, J. G., Weisz, R., Gumpertz, M. L., Duffera, M. G., & Cassel, D. K. (2007). Groundwater nitrate spatial and temporal patterns and correlations: Influence of natural controls and nitrogen management. VADOSE ZONE JOURNAL, 6(1), 53–66. https://doi.org/10.2136/vzj2006.0065 Duffera, M., White, J. G., & Weisz, R. (2007). Spatial variability of Southeastern US Coastal Plain soil physical properties: Implications for site-specific management. GEODERMA, 137(3-4), 327–339. https://doi.org/10.1016/j.geoderma.2006.08.018 Duffera, M., Robarge, W. P., & Mikkelsen, R. L. (1999). Estimating the availability of nutrients from processed swine lagoon solids through incubation studies. BIORESOURCE TECHNOLOGY, 70(3), 261–268. https://doi.org/10.1016/S0960-8524(99)00039-5 Duffera, M., Robarge, W. P., & Mikkelsen, R. L. (1999). Greenhouse evaluation of processed swine lagoon solids as a fertilizer source. JOURNAL OF PLANT NUTRITION, 22(11), 1701–1715. https://doi.org/10.1080/01904169909365748 Duffera, M., & Robarge, W. P. (1999). Soil characteristics and management effects on phosphorus sorption by highland plateau soils of Ethiopia. SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 63(5), 1455–1462. https://doi.org/10.2136/sssaj1999.6351455x Duffera, M., & Robarge, W. P. (1996). Characterization of organic and inorganic phosphorus in the highland plateau soils of Ethiopia. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 27(15-17), 2799–2814. https://doi.org/10.1080/00103629609369742