GIVE

Dr. Fritz Roka

Publications

Extension Publications (EDIS)

Dr. Roka's publication list orgainized by categories:

Books, Contributor of Chapters
  • Roka, F.M. 2006. “Labor Requirements.” In Florida Citrus: A Comprehensive Guide, SP-278. D.P.H. Tucker, J.S. Rogers, E.W. Stover, and M.R. Ziegler, editors. IFAS Communication Services, University of Florida, Gainesville, FL. December 2006. pp. 323-329.
  • Roka, F.M. and R.D. Emerson. " Demographics, Income, and Choices: Seasonal Farmworkers in Southwest Florida." In The Dynamics of Hired Farm Labor: Constraints and Community Responses, eds. J.L. Findeis, A.M. Vanderman, J.M. Larson, and J.L. Runyan, CAB International, United Kingdom, 2002. pp. 57-66. (1)
  • Emerson, R.D. and F.M. Roka. "Income Distribution and Farm Labor Markets." In The Dynamics of Hired Farm Labor: Constraints and Community Responses, ed. J.L. Findeis, A.M. Vanderman, J.M. Larson, and J.L. Runyan, CAB International, United Kingdom, 2002. pp. 137-149. (1)
Refereed Publications
  • Salifu, AW, KA Grogan, TH Spreen, and FM Roka. 2013. The Economics of the Control Strategies of HLB in Florida Citrus. Proceedings of the Fla State Hort Soc 125:22-28, 2012.
  • Roka, FM and BR Hyman. 2013. Gleaner Productivity, Implied Piece Rates, and Implications for Citrus Mechanical Harvesting. Proceedings of the Fla State Hort Soc 125:130-136, 2012. Refereed Section.
  • Shamshiri, R., R. Ehsani, J.M. Maja, and FM Roka. 2013. Determining machine efficiency parameters for a citrus canopy shaker using yield monitor data. Applied Engineering in Agriculture 29(1):33-41 (Jan 2013).
  • Ozores-Hampton, M., K.Cushman, FM Roka, and R.French-Monar.  2013. The Effects of Hurricanes on Commercial Tomato Crop Production in Southern Florida.  HortTechnology 23(4):498-504.
  • Stansly, PA, HA Arevalo, JA Qureshi, MM Jones, K Hendricks, PD Roberts, and FM Roka. 2013.Vector Control and Foliar Nutrition for Management of Huanglongbing. Pest Management Science. 10.1002/ps 3577.
  • Ozores-Hampton, M., E Simonne, F Roka, K Morgan, S Sargent, C Snodgrass, and E McAvoy.  2012. Nitrogen Rates Effects on the Yield, Nutritional Status, Fruit Quality, and Profitability of Tomato Grown in the Spring with Subsurface Irrigation. HortScience 47:1129-1133 (Aug 2012).
  • Mosley, KR, LA House, and FM Roka. 2012. Adoption of Mechanical Harvesting for Sweet Orange Trees in Florida: Addressing Grower Concerns on Long-Term Impacts. International Food and Agribusiness Management Review. 15(2):83-98 (May 2012).
  • Roka, FM. 2011. Defining the Economic “Tipping Point” in the Management of Citrus Greening:” Following the Standard Protocol of Shift to and Enhanced Foliar Nutritional Program. Thriving In a Global Market, Proceedings 18th International Farm Management Congress, Methven, New Zealand, pp 157-165.
  • Roka, F.M., L.E. Baucum, R.W. Rice, and J. Alvarez. 2010. Comparing Costs and Returns for Sugarcane Production on Sand and Muck Soils of Southern Florida, 2008-2009. Journal of American Society of Sugarcane Technologists  (30):50-66.
  • Ebel, R.C., J.K. Burns, K.T. Morgan, and F.M. Roka. 2010. Abscission Agent Application and Canopy Shaker Frequency Effects on Mechanical Harvest Efficiency of Sweet Orange. HortScience 45(7):1079-1083.
  • Blanco, G., F. Roka, J. Burns, and R. Kilmer. 2009. Cost.Benefit Analysis of Abscission for Citrus Mechanical Harvesting. Submitted abstract for the 2009Annual Meeting of the Southern Agricultural Economic Association, Atlanta, GA, January 31 – February 3, 2009.
  • Iwai, N., R. D. Emerson, and F.M. Roka. 2009. Labor Cost and Value of Citrus Operations with Alternative Technology: Enterprise DCF Approach. Submitted abstract for the 2009Annual Meeting of the Southern Agricultural Economic Association, Atlanta, GA, January 31 – February 3, 2009.
  • Arthington, J.D., F.M. Roka, J.J. Mullahey, S.W. Coleman, R.M. Muchovej, L.O. Lollis, and D. Hitchcock. 2007. Integrating Ranch Forage Production, Cattle Performance, and Economics in Ranch Management Systems for Southern Florida. Rangeland Ecology & Management 60(1):12-18.
  • Hendricks, G.S., S. Shukla, K.E. Cushman, T.A. Obreza, F.M. Roka, K.M. Portier, and E.J. McAvoy. 2007. Florida Watermelon Production Affected by Water and Nutrient Management. HortTechnology July-September 2007 17(3):328-335.
  • Burns, J.K., F.M. Roka, K-T Li, L. Pozo, and R.S. Buker. 2006. Late-season ‘Valencia’ Orange Mechanical Harvesting with an Abscission Agent and Low-frequency Harvesting. HortScience 41(3):660-663.
  • Ferrell, J.A., J.J. Mullahey, J.A. Dusky, and F.M. Roka. 2006. Competition of Giant Smutgrass (Sporobolus indicus) in a Bahiagrass Pasture. Weed Science 54(Jan-Feb):100-105.
  • Burns, J.K., R.S. Buker, and F.M. Roka. 2005. Mechanical Harvesting Capacity in Sweet Oranges is Increased with an Abscission Agent. HortTechnology 15(4):758-765.
  • Wester, M.W.*, S.D. Thornsbury, and F.M. Roka. 2002. Implications of Reform in Federal Guest Worker Legislation for Farm-Level Returns. 2002 Journal of the Amer.Soc. Farm Managers& Rural Appraisers. pp. 32-42. On-line publication: www.asfmra.org.
Non-Refereed Publications (EDIS)
  • Roka, FM and BR Hyman. 2013. Measuring Productivity of Citrus Hand Harvesters and Assessing Implications on Harvest Costs and Mechanical Harvesting. EDIS FE933, June 2013,
  • Borisova, T. and F.M. Roka. 2010. Water Quality Credit Trading: General Principles. EDIS FE824. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December 2009.
  • Roka, F.M., L.E. Baucum, and J. Alvarez. 2010. Costs and Returns for Sugarcane Production on Muck Soils in South Florida, 2008–2009. EDIS SC088. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2010.
  • Thissen, C.A. and F.M. Roka. 2010. Non-Governmental Organizations Serving Farmworkers in Florida. EDIS FE836. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. July 2010. 15 pages.
  • 2009 Handbook of Employment Regulations
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers:  Introduction. EDIS FE390. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Child Labor [State and Federal]. EDIS FE392. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Civil Rights and Antidiscrimination [Federal]. EDIS FE393. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Earned Income Tax Credit [Federal]. EDIS FE394. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Emergency Planning Community Right to Know [State]. EDIS FE395. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Family Medical Leave Act (FMLA) of 1993 [Federal]. EDIS FE396. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers:  Farm Labor Contracting and Testing [Federal and State]. EDIS FE397. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Field Sanitation and Drinking Water [Federal and State]. EDIS FE399. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Florida Landlord-Tenant Law [State]. EDIS FE400. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Human Rights Act of 1977 [State]. EDIS FE401. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Immigration Reform Programs [Federal]. EDIS FE402. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Income Tax Withholding for Farmworkers [Federal]. EDIS FE403. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Migrant Farm Labor Camps [Federal]. EDIS FE404. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Migrant Labor Housing  [State]. EDIS FE405. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Migrant and Seasonal Agricultural Worker Protection Act (MSPA) [Federal]. EDIS FE406. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Minimum Wage (Fair Labor Standards Act) [Federal]. EDIS FE407. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Occupational Safety and Health Act (OSHA) [Federal]. EDIS FE408. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: OSHA – Hazard Communication Standards [Federal]. EDIS FE409. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Plant Closing Notification/Layoff Act (WARN) [Federal]. EDIS FE410. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Polygraph Protection for Employees [Federal]. EDIS FE411. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Portal-to-Portal Act of 1947 [Federal]. EDIS FE412. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Right to Know [State]. EDIS FE413. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Right to Work [State]. EDIS FE414. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Social Security and Medicare [Federal]. EDIS FE415. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Transportation – Alcohol and Drug Testing [Federal]. EDIS FE416. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Transportation – Motor Carrier Safety Regulations for Drivers of Farm Trucks [Federal]. EDIS FE417. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Transportation – Motor Carrier Safety Regulations for Transporting Migrant Farmworkers [Federal]. EDIS FE418. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Transportation of Migrant Farmworkers [State]. EDIS FE419. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Unemployment Compensation [Federal and State]. EDIS FE420. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Work Opportunity Tax Credits (WOTC) [Federal]. EDIS FE421. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Worker Protection Standards [Federal]. EDIS FE422. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Roka, Fritz, Michael Olexa, Katherine Smallwood, Leo Polopolus, and Carol Fountain. 2009. 2009 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers: Worker’s Compensation [State]. EDIS FE423. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Borisova, T. and F. Roka. 2009. Water Quality Credit Trading: General Principles. EDIS FE824. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December, 2009.
  • Spreen, T.H., R.P. Muraro, F.M. Roka, and R.A. Morris. 2009. The Florida Citrus Industry: Government and Non-Government Organizations. EDIS FE812. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. October, 2009.
  • Roka, F.M., J. Alvarez, and L.E. Baucum. 2009. Projected Costs and Returns for Sugarcane Production on Mineral Soils in South Florida, 2007–2008. EDIS SC087. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. September, 2009.
  • Buker, R.S., J.P. Syvertsen, J.K. Burns, F.M. Roka, W.M. Miller, M. Salyani, and G.K. Brown. 2009 Mechanical Harvesting and Tree Health. EDIS HS961. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. Revised August, 2009.
  • Roka, F.M. 2009. Compensating Farm Workers through Piece Rates: Implications on Harvest Costs and worker Earnings. EDIS FE792. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. February 2009.
  • Roka, F., R. Rouse, St. Futch, and R. Muraro. 2006. Hurricanes and the Harvesting Decision. EDIS FE 624. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2006.
  • Muraro, R.P., F.M. Roka, and R.E. Rouse. 2006. Budgeting Costs and Returns for Southwest Florida Citrus Production, 2004-05. EDIS FE 631. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. June 2006.
  • Muchovej, R.M., E.A. Hanlon, E. McAvoy, M. Ozores-Hampton, F.M. Roka, S. Shukla, H. Yamataki, and K.E. Custhion. 2005.  Management of Soil and Water for Vegetable Production in Southwest Florida.  EDIS SL 233. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. October 2005. http://edis.ifas.ufl.edu/SL233.\
  • Muchovej, R.M., S. Shukla, I.V. Ezenwa, F.M. Roka, and E.A. Hanlon. 2005.  Sugarcane Production in Southwest Florida: Mineral Soils and Amendments.  EDIS SL 230. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. October 2005. http://edis.ifas.ufl.edu/SL230.
  • Futch, S. H., J.D. Whitney, J.K. Burns, and F.M. Roka. 2005.  "Harvesting:  From Manual to Mechanical." EDIS HS1017.  Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. May 2005. http://edis.ifas.ufl.edu/HS1017.
  • Futch, S.H. and F.M. Roka. 2005. Trunk Shaker Mechanical Harvesting Systems. EDIS HS1005. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2005. http://edis.ifas.ufl.edu/HS238.
  • Futch, S.H. and F.M. Roka. 2005. Continuous Canopy Shake Mechanical Harvesting Systems. EDIS HS1006. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2005. http://edis.ifas.ufl.edu/HS239.
  • Muraro, R.P., F.M. Roka, and R.E. Rouse. 2005. Budgeting Costs and Returns for Southwest Florida Citrus Production – 2003/04 Season. EDIS FE 528. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2005. http://edis.ifas.ufl.edu/FE528.
  • Buker, R.S., J.P. Syvertsen, J.K. Burns, F.M. Roka, W.M. Miller, M. Salyani, and G.K. Brown. Mechanical Harvesting and Tree Health. 2004. EDIS HS961. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. July 2004. http://edis.ifas.ufl.edu/HS961.
  • Rouse, R.E., E.M. Miavitz-Brown, and F.M. Roka. 2004. Guide to Using Rhizomal Perennial Peanut in the Urban Landscape. EDIS HS 960. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2004. http://edis.ifas.ufl.edu/HS960.
  • Muraro, R.P., F.M. Roka, and R.E. Rouse. 2003. Budgeting Costs and Returns for Southwest Florida Citrus Production – 2003/04 Season. EDIS FE 434. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. December 2003. http://edis.ifas.ufl.edu/FE434.
  • Polopolus, L.C., F.M. Roka, and C. Fountain. 2003. 2002 Handbook of Employment Regulations Affecting Florida Farm Employers and Workers. EDIS, FE 215. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. June 2003. http://edis.ifas.ufl.edu/FE215.
  • Arthington, J.D., P. Bohlen, K. Campbell, and F.M. Roka. 2003. Effect of Stocking Rates on Measures of Cow-Calf Productivity and Nutrient Loads in Surface Water Runoff. EDIS, AN 141. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. May 2003. http://edis.ifas.ufl.edu/AN141
  • Muraro, R.P. and F.M. Roka. 2003. Citrus Reset Analysis.  EDIS, FE 365. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. March 2003. http://edis.ifas.ufl.edu/FE365.
  • Emerson R.P. and F.M. Roka. 2001. Terrorist Attacks in New York City and Washington D.C.: Implications for Agricultural Labor. EDIS, FE320. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. 2001. (1)
  • Roka, F.M. 2001. Estimating Acreage of Fresh Citrus. EDIS, FE303. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. 2001. (2)
  • Roka, F.M. and S.W. Longworth. 2001. Labor Requirements in Florida Citrus. EDIS,
    FE304. Florida Cooperative Extension Service, Institute of Food and Agricultural
    Sciences, University of Florida, Gainesville, FL. 2001. (1)
  • Muraro, R.P., F.M. Roka, and T.H. Spreen. 2001. An Overview of Argentina's Citrus Canker Control Program. EDIS, FE285. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. 2001.
  • Muraro, R.P. F.M. Roka, and T.H. Spreen. 2001. Grower Costs of Having Citrus Canker in Florida. EDIS, FE286. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. 2001. (2)
  • Roka, F.M., R.M. Muchovej, and T.A. Obreza. 2001. Assessing Economic Value of Biosolids. EDIS, AG 115. Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL. 2001. (2)
Article in Trade Journals
  • Stansly, PS and FM Roka. 2013. Economics of HLB Vector Control and Foliar Nutrition. Citrus Industry Magazine 94(6): 6-9.
  • Roka, FM. 2012. True Costs of Hand Harvesters. Citrus Industry Magazine 93(8):14-16.
  • Roka, FM and CA Thissen. 2012. Florida’s Farm Labor Supervisor Training Program. Citrus Industry Magazine 93(8):18-20.
  • Ebel, RE, T_Spann, and FM Roka. 2011. CMNP and mechanical harvesting of Valencias. Citrus Industry Magazine 92(8):22-25.
  • Roka, F., C. Asuaje, and C. Thissen. 2011. Voluntary program teaches farm labor contractors how to avoid common violations. Citrus & Vegetable – Immokalee Report. Nov-Dec 2011: 18.
  • Roka, FM. 2011. Minimum wages and implications of agricultural piece rates. The Vegetarian Newsletter, Horticultural Sciences Dept, University of Florida, November 2011.
  • Hyman, B., F.M. Roka, J. Syvertsen, R.C. Ebel, T.M. Spann, and R. Ehsani. 2010.  Popular Mechanics - Moving Citrus Mechanical Harvesting Forward. Florida Grower 103(2):20-21 February.
  • Spann, T.M., R.A. Atwood, M.M. Dewdney, R.C. Ebel, R. Ehsani, G. England, S.,H. Futch, T. Gaver, T. Hurner, C. Oswalt, M.E. Rogers, F.M. Roka, M.A. Ritenour, M. Zekri. 2010. IFAS Stakeholder Guidance for Huanglongbing (Greening) Management. Citrus Industry Magazine 91(4):6-13 April.
  • Roka, F.M. 2010. Mechanical Harvesting and the Cost of Gleaning. Citrus Industry Magazine 91(5):12-14 May.
  • Roka, F.M. and B. Hyman. 2010. Overcoming Obstacles and Making the Transition. Citrus Industry Magazine 91(7):26-27 July.
  • Roka, F.M. and R.P. Muraro. 2010. Evaluating Economic Efficiency of APS for Citrus. Citrus Industry Magazine 91(8):12-16 August.
  • Ebel, R., K. Morgan, and F. Roka. 2010. Factors to consider in using the abscission agent CMNP to loosen sweet oranges for mechanical harvesting. Citrus Industry Magazine 91(8):6-9 September.
  • Roka, F.M.,  J.K. Burns, J.P. Syvertsen, R. Ebel. 2009. Advantages from registration of an abscission product. Citrus Industry Magazine 90(3):22-23 March.
  • Spann, T.M., J.K. Burns, F.M. Roka, B.R. Hyman, J.P. Syvertsen, M.D. Danyluk, and R. Ehsani. 2008. Mechanical Harvesting:  The 2006-07 harvest season. Citrus Industry Magazine (March 2008): 27-30.
  • Roka, F.M. and R. Ehsani. 2007. Labor savings from new technologies. Citrus Industry 88(7):10-11, July.
  • Roka, F.M. 2007 Mechanical Harvesting – what’s the cost? Citrus Industry 88(7):12, July.
  • Hyman, B.R. and F.M. Roka. 2007 Field day addresses mechanical harvesting. Citrus Industry 88(6):6, June.
  • Roka, F.M. and J.K. Burns. 2007. Benefits of an abscission agent for mechanically harvested citrus. Citrus Industry 88(4):22-24, April.
  • Roka, F.M. and J.K. Burns. 2007. Needing Separation. Florida Grower 100(3):30, March.
  • Rouse, R., W. Castle, K. Morgan, F. Roka, and A. Wheaton. 2007. Why plant a model citrus grove? Citrus Industry 88(1):13-14, January.
  • Roka, F.M. and R.E. Rouse. 2006. The future of the Florida citrus industry – insights from the 2006 Citrus Expo. Citrus Industry 87(12):14-15, December.
  • Roka, F.M. and R.E. Rouse. 2006. Will Florida citrus growers take full advantage of change? Citrus Industry 87(11):20-21, November.
  • Rouse, R.E. and F.M. Roka. 2006. Canker and greening – lessons from South America. Citrus Industry 87(11):7-9, November.
  • Hyman, B.R. and F.M. Roka. 2006. New IFAS website for mechanical harvesting. Citrus Industry 87(10): 7-8, October.
  • Rouse, R.E. and F.M. Roka. 2006. Citrus in Transitional Times. Citrus Industry 87(8): 9, August.
  • Rouse, R.E. and F.M. Roka. 2005. Building value for citrus beyond the “commodity.” Citrus Industry 86(4): 17, July-August.
  • Roka, F.M., S.H. Futch, R.E. Rouse, and R.P. Muraro. 2004. Hurricanes and the Harvesting Decision. Citrus Industry 85(11):15-16, November.
  • Buker, R.S., J.K. Burns, and F.M. Roka. 2004. Can We Mechanically Harvest Citrus the Entire Season?  Citrus Industry 85(10):12-13, October.
  • Rouse, R.E. and F.M. Roka. 2004. Building value for citrus beyond the “commodity.” Citrus Industry 85(8): 13, August.
  • Futch, S.H. and F.M. Roka. 2004. Trunk Shaker Mechanical Harvesting Systems. Citrus Industry 85(7): 20-21, July.
  • Polopolus, L.C., M.T. Olexa, F.M. Roka, and C. Fountain. 2004. Field Sanitation and Drinking Water Regulations. Citrus & Vegetable Magazine, (June):34-36.
  • Futch, S.H. and F.M. Roka. 2004. 2004. Continuous Canopy Shake Mechanical Harvesting Systems. Citrus Industry 85(6):12-14, June.
  • Roka, F.M. 2004. Dollars and Cents of Mechanical Harvesting. Citrus Industry 85(5):20-21, May.
  • Futch, S.H., J.D. Whitney, J.K. Burns, and F.M. Roka. 2004. Harvesting from Manual to Mechanical. Citrus Industry 85(2):21-22, February.
  • Rouse, R.E., F.M. Roka, and J. Carson. 2003. Trailer Trash. Citrus Industry 86(4):34, December.
  • Muraro, R.P. and F.M. Roka. 2003. Evaluate the Economics of Tree Replacement. The Florida Grower (May):24-26.
  • Rouse, R.E., E.M. Miavitz-Brown, and F.M. Roka. 2003. Perennial Peanut finds its Niche in Florida. The Peanut Grower (March):14.
  • Roka, F.M. 2002. To Shake or Not to Shake. Citrus & Vegetable Magazine (September): 10-12.
  • Roka, F.M. 2001. "Outlook on Citrus Mechanical Harvesters." Citrus and Vegetable Magazine 65(13): 16, September.
Proceedings
  • Barkataky, S., KT Morgan, RC Ebel, and FM Roka. 2012. Effects of Short-Term Drought Stress and Mechanical Harvesting on Sweet Orange Tree Health, Water Uptake and Yield. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:73-82.
  • Ebel, RC, FM Roka, and KT Morgan. 2012. Field Research with the Abscission Agent CMNP as an Aid to Mechanical Harvesting of Sweet Orange. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:97-100.
  • Roka, FM, RJ Ehsani, and T Spann. 2012. Harvest Debris and Cost Implications for Mechanical Harvesting. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:159-162.
  • Whitney, JD, BR Hyman, and FM Roka. 2012. The Past, Present and Future of Citrus Mechanical Harvesting. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:183-188.
  • Iwai, N., RD Emerson, and FM Roka. 2012. Immigration Reform and Citrus Harvest Mechanization in a World of Uncertainty. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:233-240.
  • Roka, FM and BR Hyman.  2012. Mechanical Harvesting of Sweet Oranges for Juice Processing. Proceedings of the First International Symposium on Mechanical Harvesting and Handling Systems of Fruits and Nuts, James P. Syvertsen, editor. Acta Horticulturae 965:241-243.
  • Salifu, AW, K Grogan, T Spreen and F Roka. 2013. The Economics of the Control Strategies of HLB in Florida Citrus. Proceedings of the Fla. State Hort. Soc., Vol. 125:22-28.
  • Roka, FM and BR Hyman. 2013. Gleaner Productivity, Implied Piece Rates, and Implications for Citrus Mechanical Harvesting. Proceedings of the Fla. State Hort. Soc., Vol. 125:130-136.
  • Thissen, CA, FM Roka, and MT Bayer. 2012. Regulatory Issues of Transporting Migrant & Seasonal Farm Workers. Monica Ozores-Hampton and Crystal Snodgrass, editors, 2012 Florida Tomato Institute Proceedings (Sep):31-33.
  • Roka, FM. 2012. Economic Arguments for and against Tree Eradication to Control HLB. Proceedings of the Fla. State Hort. Soc., Vol. 124:119-122.
  • Roka, FM, M Ozores-Hampton, and G McAvoy. 2011. Estimating Financial Losses to Vegetable Crop Production from a Freeze Event. 2011 Tomato Institute Proceedings, p:21-23.
  • Roka, FM, CR Asuaje, and CA Thissen. 2011. Farm Labor Contractor (FLC) Core Training Program. 2011 Tomato Institute Proceedings, p:34-37.
  • Gazula, A., E. Simonne, and F. Roka. 2010. Nutrient Management Programs for Fresh Market Tomatoes Grown with Plasticulture:  Economic Insights. Proceedings of the Fla. State Hort. Soc., Vol 123: 196-199.
  • Roka, F., M. Ozores-Hampton, and G. McAvoy. 2010. Estimating Financial Losses from a Weather Event Resulting in Crop Losses. Proceedings of the Fla. State Hort. Soc., Vol 123: 134-137.
  • Ebel, RC, KT Morgan, and FM Roka. 2011. Interaction of CMNP Application and Harvest Date of ‘Hamlin’ Sweet Orange. Proceedings of the Fla. State Hort. Soc., Vol. 123:59-61.
  • Morgan, K.,  A. Schumann, W. Castle, E. Stover,  P. Spyke, Roka, F.M., R.P.Muraro, R.A. Morris. 2010. Citrus Production Systems to Survive Greening – Horticultural Practices. Proceedings of the Florida State Horticultural Society122: 114-121.
  • Roka, F.M., R.P.Muraro, R.A. Morris, P. Spyke, K. Morgan, A. Schumann, W. Castle, and E. Stover. 2010. Citrus Production Systems to Survive Greening – Economic Thresholds. Proceedings of the Florida State Horticultural Society122:122-126.
  • Roka, F.M. 2009. Uncertain Adoption Despite Certain Benefits – Citrus Mechanical Harvesting in Florida. Proceedings of the 45th Annual Meeting of the Caribbean Food Crops Society, forthcoming.
  • Ebel, RC, JK Burns, K Morgan and R Roka. 2009 Interaction of CMNP Concentration and Canopy Shaker Setting on Fruit Removal of Sweet Orange. Proceedings of the Fla. State Hort. Soc. Vol. 122:132-135.
  • Roka, F.M. 2009. Labor Issues Confronting Florida Tomato and Orange Growers. Conference Proceedings Immigration Reform: Implications for Farmers, Farm Workers, and Communities. Washington D.C., May 20-22, 2009. 16 pp.
  • Searcy, J., F. Roka, and T. Spreen. 2008. Scheduling the Harvest of Florida Oranges to Maximize Juice Production. Proceedings of the Florida State Horticultural Society, volume 121: 55-60.
  • Blanco, G., F. Roka, J. Burns, and R. Kilmer. 2008. The Economic Value of Abscission for Mechanically Harvest Late-Season ‘Valencia’ Oranges. . Proceedings of the Florida State Horticultural Society, volume 121: 61-64.
  • Roka, F.M. and B.R. Hyman. 2009. Gleaning after citrus mechanical harvesting – Labor productivity. 44th Annual Meeting of the Caribbean Food Crops Society Miami, Florida July 15-19, 2008, Vol. 44(2):172-178.
  • Simonne, E., M. Ozores-Hampton, R. Littell, K. Cushman, F. Roka, P. Stansly, S. Shukla, P. Roberts, K. Morgan, T. Obreza, G. McAvoy, P. Gilreath, and D. Parmenter. 2007. Power Analysis of On-Farm Fertilizer Trials with Tomato. Proceedings of the Florida State Horticultural Society, volume 120: 191-196.
  • Halbert S, Manjunath K, Roka F, and Brodie M. (2008). Huanglongbing (citrus greening) in Florida, 2008. Proceedings of FFTC-PPRI-NIFTS Joint Workshop on Management of citrus greening and virus diseases for the rehabilitation of citrus industry in the ASPAC, Hanoi, Vietnam 8-12 September 2008: 58-67.
  • Roka, F.M. 2006. Harvesting Economics – Possibilities and Challenges. Proceeding of the Fla. State Hort. Soc. 119:198.
  • Burns, J.K., L. Pozo, K. Morgan, and F.M. Roka. 2006. Improving Efficacy of Abscission Sprays for Mechanically Harvested Oranges. Proceeding of the Fla. State Hort. Soc. 119:190-194.
  • Ozores-Hamption, M., E. Simonne, E. McAvoy, P. Stansly, S. Shukla, P. Roberts, F. Roka, T. Obreza, K. Cushman, P. Gilreath, and D. Parmenter. 2006. Nitrogen BMP Efforts with Tomato Production in Florida: Update for 2005-06 Season.  Proceeding of the Fla. State Hort. Soc. 119: 284-288.
  • Medina, L.C*., T. Obreza, J. Sartain, F.M. Roka, R.E. Rouse. 2006. Evaluation of a controlled-release fertilizer program on Florida orange production. Graduate Student Forum – Soils and Environmental Quality. Proceedings of the Florida Soil and Crop Science Society 2006.
  • Roka, F.M., J.K. Burns, and R.S. Buker. 2005. Mechanical Harvesting without Abscission Agents – Yield Impacts on Late Season ‘Valencia’ Oranges. Proceeding of the Fla. State Hort. Soc. 118(2005):25-27.
  • Ozores-Hampton, M., E.H. Simonne, E.J. McAvoy, F.M. Roka, P.D. Roberts, P.A. Stansly, S. Shukla, T.A. Obreza, K.E. Cushman, P.R. Gilreath, J.P. Gilreath, and A.J. Whidden. 2005. BMP Fertilizer Trials in Central and Southwest Florida. Florida Tomato Institute Proceedings 2005:8-11.
  • Roka, F.M. and R.E. Rouse. 2004. Tree Shaping and Grove Design to Enhance Performance of Citrus Mechanical Harvesting. Proceeding of the Fla. State Hort. Soc. 117(2004):117-119.
  • Rouse, R.E., F.M. Roka, and E.M. Miavitz-Brown. 2004. Guide for Establishing Perennial Peanut as a Landscape Groundcover. Proceeding of the Fla. State Hort. Soc. 117(2004):289-290.
  • Roka, F.M. and R.E. Rouse. 2004. Citrus Mechanical Harvesting – Balancing Production Goals with Harvesting Efficiency. Proceedings of the InterAmerican Society for Tropical Horticulture. 48:40-42.
  • Roka, F.M., R.E. Rouse, and E.M. Miavitz-Brown. 2003. Economic Considerations from Using Perennial Peanut in Urban Landscapes. Proceeding of the Fla. State Hort. Soc. 116(2003):339-341.
Refereed Abstracts
  • Blanco, G., F. Roka, J. Burns, and R. Kilmer. 2009. Cost.Benefit Analysis of Abscission for Citrus Mechanical Harvesting. Submitted abstract for the 2009Annual Meeting of the Southern Agricultural Economic Association, Atlanta, GA, January 31 – February 3, 2009.
  • Iwai, N., R. D. Emerson, and F.M. Roka. 2009. Labor Cost and Value of Citrus Operations with Alternative Technology: Enterprise DCF Approach. Submitted abstract for the 2009Annual Meeting of the Southern Agricultural Economic Association, Atlanta, GA, January 31 – February 3, 2009.
  • Searcy, J., F.M. Roka, and T.H. Spreen. Optimal Harvest Time of Florida Valencia Oranges to Maximize Grower Returns. Journal of Agriculture & Applied Economics 39(2):***, February 3-6, 2007, Mobile AL.
  • Cushman, K., S. Shukla, G. Hendricks, T. Obreza, F. Roka, and E. McAvoy. 2006. Comparability of Nutrient and Water Management Strategies for Seepage-irrigated Watermelon in South Florida. HortScience 41:1014.
  • Muraro, R.P., F.M. Roka, and T.H. Spreen. 2006. The “Phantom Costs” of Florida’s Citrus Industry. Journal of Agriculture & Applied Economics 38(2):***, February 7, 2006, Orlando, Florida.
  • Ozores-Hampton, M., E.H. Simonne, E.J. McAvoy, P.A. Stansly, P.D. Roberts, F.M. Roka, T.A. Obreza. 2005. Challenges and Opportunities with Vegetable BMPs in Southwest Florida. ASHS 40(4):1075
  • Buker, R.S., J.K. Burns, and F.M. Roka. 2004. Optimizing Continuous Canopy Shakers for Late Season ‘Valencia’ Harvest. ASHS 39(4):885.
  • Burns, J.K., R.S. Buker, and F.M. Roka. 2004. Fruit Removal and Recovery during Citrus Harvesting are Improved When Abscission Agent Applications are used with Mechanical Harvesters. ASHS 39(4):885.
  • Dorbecker, H.D.*, F.M. Roka, and R.D. Emerson. 2003. Factors Affecting Productivity of Citrus Harvesters. Journal of Agriculture & Applied Economics 35(2):435.
  • Roka, F.M. and B.R. Hyman. 2003. Weighing the Options of Citrus Mechanical Harvesting: A Grower’s Perspective. Journal of Agriculture & Applied Economics 35(2):452.
2015_Roka_F_465x581

Associate Professor, Agricultural Economics