At Berea College from 2002 - 2021
-
"Effects of added biomass, soil pH and calcium on the solubility of Minjingu phosphate rock in a Kenyan Oxisol"Savini, I.,Smithson, P.C., Karanja, N.K..Archives of Agronomy and Soil Science, 52/1 (2006). 19-36.
-
"Influence of Tithonia diversifolia and triple superphosphate on dissolution and effectiveness of phosphate rock in acidic soil"Savini, I., Smithson, P.C., Karanja, N.K., Yamasaki, H.Journal of Plant Nutrition and Soil Science,169/5 (2006). 593-604.
-
"A global assessment using PCR techniques of mycorrhizal fungal populations colonising Tithonia diversifolia"Sharrock, R.A., Sinclair, F.L., Gliddon, C., Rao, I.M., Barrios, E., Mustonen, P.J., Smithson, P., Jones, D.L., Godbold, D.L. Mycorrhiza,14/2 (2004).103-109.
-
"Maize productivity and nutrient dynamics in maize-fallow rotations in western Kenya"Bünemann, E.K., Smithson, P.C., Jama, B., Frossard, E., Oberson, A. Plant and Soil, 264/1-2 (2004).195-208
-
"Microbial community composition and substrate use in a highly weathered soil as affected by crop rotation and P fertilization"Bünemann, E.K., Bossio, D.A., Smithson, P.C., Frossard, E., Oberson, A..Soil Biology and Biochemistry, 36/6 (2004). 889-901.
-
"Phosphorus dynamics in a highly weathered soil as revealed by isotopic labeling techniques"Bünemann, E.K., Steinebrunner, F., Smithson, P.C., Frossard, E., Oberson, A.. Soil Science Society of America Journal, 68/5,(2004).1645-1655.
-
"Potassium and magnesium fertilizers on banana in Uganda: Yields, weevil damage, foliar nutrient status and DRIS analysis"Smithson, P.C., McIntyre, B.D., Gold, C.S., (...), Night, G., Okech, S.. Nutrient Cycling in Agroecosystems, 69/1 (2004). 43-49.