Emeritus Faculty

Donald A. Graetz

Professor Emeritus, Environmental Soil Biochemistry


Program Areas

Departmental Research Areas:

  • Management of Nutrients, Pesticides, and Wastes
  • Soil Quality/Ecosystem Services
  • Wetlands and Aquatic Systems

Research focus:
Studies elemental (N, P, S, C) cycling in wetland soils, lake sediments, and poorly-drained and flooded soils are used to evaluate environmental problems associated with these elements. Research emphasizes environmental problems such as determining the ecosystem assimilative capacity for municipal and animal wastes.


Select Publications
  • Hanselman, T.A., D. A. Graetz, and T.A. Obreza. 2004. A comparison of In Situ methods for measuring net nitrogen mineralization rates of organic soil amendments. J. Environ. Qual. 33:1098-1105.
  • Hanselman, T. A., D.A. Graetz, and A. C. Wilke. 2004. Comparison of three enzyme immunoassays for measuring 17B-estradiol in flushed dairy manure wastewater. J. Environ. Qual. 33:1919-1923.
  • Nair, V. D. and D. A. Graetz. 2004. Agroforestry as an approach to minimizing nutrient loss from heavily fertilized soils: The Florida experience. Agroforestry Systems 61: 269-279.
  • Nair, V. D., K. M. Portier, D. A. Graetz, and M. L. Walker. 2004. An environmental threshold for degree of phosphorus saturation in sandy soils. J. Environ. Qual. 33:107-113.
  • Hanselman, T. A., D.A. Graetz, and A. C. Wilke. 2003. Fate of poultry manure estrogens in soils: A review. Soil Crop Sci. Soc. Florida Proc. 62-8-12.
  • Hanselman, T. A., D. A. Graetz, and A. C. Wilke. 2003. Manure-borne estrogens potential environmental contaminants: A Review. Environ. Sci. Tech. 37:5471-5478.
  • Mattos, D., D.A. Graetz, and A. K. Alva. 2003. Biomass distribution and 15-N partitioning in citrus trees on a sandy Entisol. Soil Sci. Soc. Am. J. 67:555-563.
  • Mattos, D. Jr., a. K. Alva, S. Paramasivam, and D. A. Graetz. 2003. Nitrogen volatilization and mineralization in a sandy Entisol of Florida under citrus. Comm. Soil Science Plant Analysis 34:1803-1824.
  • Nair, V. D., D.A. Graetz and D. O. Dooley. 2003. Phosphorus release characteristics of manure and manure-impacted soils. Food, Agriculture and Environment 1:217-223.
  • Wilson, S. B., P. J. Stoffella, and D.A. Graetz. 2003. Compost amended media and irrigation systems influence on containerized perennial Salvia. J. Am. Soc. Hort. Sci. 128:260- 268.
  • Macoon, B. K. R. Woodard. L.E. Sollenberger, E.C. French, K.M. Portier, D.A. Graetz, G. M. Prine, and H.H. Van Horn, jr. 2002. Dairy effluent effects on herbage yield and nutritive value of forage cropping systems. Agron. J. 94:1043-1049.
  • Nair, V.D. and D. A. Graetz. 2002. Phosphorus saturation in Spodosols impacted by manure. J. Environ. Qual. 31:1279-1285.
  • Villapando**, R.R. and D.A. Graetz. 2001. Water table effects on phosphorus reactivity and mobility in a dairy manure-impacted spodosol. Ecol. Eng. 18:77-89.
  • Villapando**, R.R. and D.A. Graetz. 2001. Phosphorus sorption and desorption properties of the spodic horizon from selected Florida spodosols. Soil Sci. Soc. Am. J. 65:331-339.

Donald Graetz, Emeritus Faculty, Soil and Water Sciences Department, University of Florida


email: graetz@ufl.edu