Dr. Mallarino research program focuses on developing cost-effective and environmentally sound nutrient management practices for cropping systems. Emphasis is on P, K, micronutrients, lime, and manure P management for conservation tillage systems including calibration of soil and plant tissue tests, fertilizer and manure placement methods, impacts of nutrient management on soil and P water quality, development of P loss risk assessment tools, and use of precision agriculture technologies. The program integrates conventional field plot and laboratory research with innovative on-farm research and demonstrations, and it is developed in cooperation with producers, agribusiness, and extension agronomists.
Dr. Mallarino is actively involved in state and regional extension activities, including training of field crop extension specialists, supporting state-wide extension programs related to crop production and environmental nutrient management issues (including several projects of the agribusiness education program and continuing education programs), developing P and K fertilizer recommendations, and teaching Continuing Education Soil Fertility courses.
[Asterisks identify Mallarino graduate students or research associates]
Baffaut, C., N.O. Nelson, J.A. Lory, G.M.M.M.A. Senaviratne, A.B. Bhandari, R.P. Udawatta, D.W. Sweeney, M.J. Helmers, M.W. Van Liew, A.P. Mallarino, and C.S. Wortmann. 2017. Multisite evaluation of APEX for water quality: I. Best professional judgement parameterization. J. Environ. Qual. 46:1323-1331.
Nelson, N.O., C. Baffaut, J.A. Lory, G.M.M.M.A. Senaviratne, A.B. Bhandari, R.P. Udawatta, D.W. Sweeney, M.J. Helmers, M.W. Van Liew, A.P. Mallarino, and C.S. Wortmann. 2017. Multisite evaluation of APEX for water quality: II. Regional parameterization. J. Environ. Qual. 46:1349-1356.
Dagna, N.E.*, and A.P. Mallarino. 2014. Beef cattle manure survey and assessment of crop availability of phosphorus by soil testing. Soil Sci. Soc. Am. J. 78:1035-1050.
Mallarino, A.P., Sawyer, J.E., and S.K. Barnhart. 2013. General guide for crop nutrient recommendations in Iowa. Publ. PM 1688 (Rev.). Iowa State. Univ. Extension.
Allen, B.L.*, A.P. Mallarino, J.F. Lore, J.L. Baker, and M.U. Haq. 2012. Phosphorus lateral movement through subsoil to subsurface tile drains. Soil Sci. Soc. Am. J. 76:710-717.
Kaiser, D.E.*, A.P. Mallarino, and J. E. Sawyer. 2010. Utilization of poultry manure phosphorus for corn production. Soil Sci. Soc. Am. J.74: 2211-2222.
Mallarino, A.P., and D.J. Wittry*. 2010. Crop yield and soil phosphorus as affected by liquid swine manure phosphorus application using variable-rate technology. Soil Sci. Soc. Am. J. 74:2230-2238.
Barbazán, M.M.*, A. P. Mallarino, and J. E. Sawyer. 2009. Liquid swine manure phosphorus utilization for corn and soybean production. Soil Sci. Soc. Am. J. 73:654-662.
Kaiser, D.E.*, A.P. Mallarino, M.U. Haq*, and B.L. Allen*. 2009. Runoff phosphorus loss immediately after poultry manure application as influenced by the application rate and tillage. J. Environ. Qual. 38:299-308.
Allen, B.L.*, and A.P. Mallarino. 2008. Effect of liquid swine manure rate, incorporation, and timing of rainfall on phosphorus loss with surface runoff. J. Environ. Qual. 37:125-137.
Bermudez, M.*, and A.P. Mallarino. 2007. Impacts of variable-rate phosphorus fertilization based on dense grid soil sampling on soil-test phosphorus and grain yield of corn and soybean. Agron. J. 99:822-832.
Allen, B.L.*, and A.P. Mallarino. 2006. Relationships between extractable soil phosphorus and phosphorus saturation after long-term fertilizer or manure application. Soil Sci. Soc. Am. J. 70:454-463.
Allen, B.L.*, A.P. Mallarino, J.G. Klatt*, J.L. Baker, and M. Camara. 2006. Soil and surface runoff phosphorus relationships for five typical USA Midwest soils. J. Env. Qual. 35:599-610.
Mallarino, A.P., and D.J. Wittry*. 2004. Efficacy of grid and zone soil sampling approaches for site-specific assessment of phosphorus, potassium, pH, and organic matter. Precision Agric. 5:131-144.
Wittry, D.J.*, and A.P. Mallarino. 2004. Comparison of uniform- and variable-rate phosphorus fertilization for corn-soybean rotations. Agron. J. 96:26-33.
Klatt, J.G.*, A.P. Mallarino, J.A. Downing, J.A. Kopaska, and D.J. Wittry*. 2003. Soil phosphorus, management practices, and their relationship to phosphorus delivery in the Iowa Clear Lake agricultural watershed. J. Env. Qual. 32: 2140-2149.
Atia, A.M.*, and A.P. Mallarino. 2002. Agronomic and environmental phosphorus testing for soils receiving swine manure. Soil Sci. Soc. Am. J. 66:1696-1705.
Mallarino, A.P., B.M. Stewart, J.L. Baker, J.A. Downing, and J.E. Sawyer. 2002. Phosphorus indexing for cropland: Overview and basic concepts of the Iowa phosphorus index. J. Soil Water Conserv. 57:440-447.