Ag & the Environment
Publications

Current Extension Publications

Spill Prevention, Control and Countermeasure (SPCC)
The Agricultural Producer’s Comprehensive Guide to Federal Oil Pollution Prevention Regulations (W250)

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Open Burning of On-farm Wastes
A guide to legal and safe open burning of on-farm wastes in Tennessee (W249)

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Mortality Management
Disposing of Large Animal Mortalities (W255)
Burying Large Animal Mortalities (W258)
Composting Large Animal Mortalities in Tennessee (W251)
Land-filling Large Animal Mortalities in Tennessee (W252)
Using Incinerators for Poultry Mortality Management

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Livestock Watering Systems
Solar-Powered Livestock Watering Systems (PB1640)
Selection of Alternative Livestock Watering Systems (PB1641)
Selection of Beef Watering Systems (WQS-01-01)

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Micro-Irrigation
Basic Filtration for Micro-Irrigation Systems
Basic Fertigation for Micro-Irrigation Systems

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Other
EPCRA Guidance for Poultry Producer Reporting Requirements. Circular and factsheet, Tennessee Poultry Association, Grower Education Seminar Series.

Efficient use of Biosolids on Beef Pastures and Hay Fields. Proceedings of the 2008 University of Tennessee Beef & Forage Field Day.

Horse Manure Management. University of Tennessee Extension Master Horse Owner Manual.

Funding Available to Address Livestock Drought Stress. UTIA Web Packet News and Information for Use by Agents, September 4, 2007.

[Contact Shawn Hawkins for further information]

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Current Research Publications

Duncan, L. A., J. S. Tyner, S. A. Hawkins, J. R. Buchanan, and J. Lee. 2015. Fate and Transport of 17β-estradiol Beneath Animal Waste Holding Ponds. Journal of Environmental Quality, 44(3), 982-988.

Zhou, X., C. D. Clark, S. Surendran Nair, S. A. Hawkins, and D. M. Lambert. 2015. Environmental and economic analysis of using SWAT to simulate the effects of switchgrass production on water quality in an impaired watershed. Agricultural Water Management, 160:1-13.

Lambert, D. M., C. D. Clark, S. A. Hawkins, F. R. Walker, and A. Layton. 2014. A study of cattle producer preferences for best management practices in an East Tennessee watershed. Journal of Soil and Water Conservation, 69(1): 41-53.

Hawkins, S. A., Robinson, K., Layton, A., and Sayler, G. 2012. Molecular indicators of Nitrobacter spp. population and growth activity during an induced inhibition event in a bench scale nitrification reactor. Water Research, 46(6):1793-1802.

Lopes, N., S. A. Hawkins, P. Jegier, F. -M. Menn, G. S. Sayler, and S. Ripp. 2012. Detection of dichloromethane with a bioluminescent (lux) bacterial bioreporter. Journal of Industiral Microbiology and Biotechnology, 39(1):45-53."

Hawkins, S. A., K. G. Robinson, A. C. Layton, and G. S. Sayler. 2010. Limited impact of free ammonia on Nitrobacter spp. inhibition assessed by chemical and molecular techniques. Bioresource Technology, 101:4513-4519.

Henry, T. B., J. T. McPherson, E. D. Rogers, T. P. Heah, S. A. Hawkins, and A. C. Layton. 2009. Changes in the relative expression pattern of multiple vitellogenin genes in adult male and larval zebrafish exposed to exogenous estrogens. Comparative Biochemistry and Physiology: Part A Molecular and Integrative Physiology, 154(1):119-126.

Hawkins, S. A., A.C. Layton, S. Ripp, D. Williams, and G.S. Sayler. 2008. Genome sequence of the Bacteroides fragilis phage ATCC 51477-B1. Virology Journal, 5:97.

Hawkins, S. A., K.G. Robinson, A.C. Layton, and G.S. Sayler. 2008. Response of Nitrobacter spp. ribosomal gene and transcript abundance following nitrite starvation and exposure to mechanistically distinct inhibitors. Environmental Science and Technology, 42(3), 901-907.

Hawkins, S. A., K.G. Robinson, A.C. Layton, and G.S. Sayler. 2007. Response of Nitrobacter spp. ribosomal gene and transcript abundance following nitrite starvation and exposure to mechanistically distinct inhibitors. Environmental Science and Technology, website published December 29, 2007.

Hawkins, S. A., K. G. Robinson, A. C. Layton, and G. S. Sayler. 2006. A Comparison of Ribosomal Gene and Transcript Abundance During High and Low Nitrite Oxidizing Activity Using A Newly Developed Real Time PCR Detection System Targeting the Nitrobacter spp. 16S-23S Intergenic Spacer Region. Environmental Engineering Science, 23(3):521-532.

[Contact Shawn Hawkins for further information]