Horticultural Sciences Department

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Dr. Guodong “David” Liu

Office:1229 Fifield Hall

For more information, visit Dr. Liu's website. 

Assistant Professor

Areas of Research

  • Nutrient eco-management vs. environmental sustainability
  • Nutrient stewardship for vegetable and fruit production
  • Oxygen fertilization vs. hypoxic stresses
  • Identification of N- and P-efficient genotypes from crop germplasm banks

Educational Background

  • Ph.D. – Physiology and Genetics of Plant Nutrition, Chinese Academy of Agricultural Sciences, Beijing, China
  • M.S.  – Plant Physiology and Biochemistry, Hunan Agricultural University, Changsha, China
  • B.S. – Crop Science, Hunan Agricultural University, Changsha, China

Teaching Responsibilities

Extension Programs

  • Educational programs on vegetable and fruit crop nutrition
  • Provide support to county and regional extension agents
  • Interact with extension faculty and industry members via demonstration research, publications, presentations and training activities

Work and International Experiences

  • Assistant Professor, University of Florida, Gainesville, FL (2011 – present)
  • Postdoctoral Research Associate, USDA-ARS, Prosser, WA (2010 – 2011)
  • Visiting Professor and Postdoctoral Research Associate, University of Florida, Homestead, FL (2004 – 2010)
  • Visiting Scientist, University of Missouri-Rolla, Rolla, MO (2002 – 2004)
  • Visiting Scholar, University of Massachusetts, Amherst, MA (May 2001)
  • Agriculture Consultant, The Overseas Projects Corporation of Victoria Ltd (OPCV), Australia (June-August, 2001)
  • Visiting Scholar, AgResearch Grasslands Research Center, Palmerston North, New Zealand (March-June, 1999; April – June, 2000)
  • Agronomy Consultant, United Nations Development Program (UNDP), the United Nations (November-December, 1999)
  • Agronomy Consultant, International Fund for Agricultural Development (IFAD) and World Food Program (WFP), the United Nations (November 1997 – March 1998)
  • Agronomy Consultant, IFAD  and WFP, the United Nations (November 1996 – January 1997)
  • Associate Professor and Professor, the Chinese Academy of Agricultural Sciences, Beijing, China  (1995 – 2006)

Honors and Awards

  • Art Hornsby Distinguished Extension Professional and Enhancement Award. University of Florida / IFAS Extension.2016
  • American Society for Horticutural Science, Vegetable Crop Management (VCM) Working Group Chair, 2015-2016
  • Sadler Distinguished Extension Professional and Enhancement Award. University of Florida / IFAS Extension.2014
  • Florida State Horticultural Society, Vice-President - Vegetable Section, 2013-2014
  • Science Leader in Agriculture for the 21st Century, the Chinese Academy of Agricultural Sciences, Beijing, China, 1999 - 2006

Program Personnel

From left: Myself, Muhammad, Tanumoy, Xiangju, Dario, Ye, Danyang, Yang, Yucong, Yuan, Chunfang on July 30, 2016

From left: Yuqi, Yang, Yucong, myself, Danyang, Fupeng, Xiangju, Kshitij, Dario, and Tanumoy in fall 2015

From left: Fupeng, Yan, Zhongdong, Qasim, Yuqi, Moshe, Yang, Danyang and myself before Christmas 2014

From left: Tao, Yuqi, Moshe, Xiaolin, myself, Yang, Zhongdong, and Danyang in 2014

From Left: Yiping, Emily, Brett, Ben, David, Derly, and Vicky in 2103


Mary Dixon

Undergraduate Student

Xiangju Fu

Ph.D. Student

Yucong Xie

M.S. Student

Liguang Li

Postdoctoral Research Associate


Danyang Liu

M.S. Student

Dr. Muhammad Shahid

Biological Scientist

Qingyuan Xiang

Student Intern

Yang Fang

M.S. Student


Former Personnel

Selected Publications

  1. Fang, Y. J. Williamson, R. Darnell, Y.C. Li, and G.D. Liu, 2018. Optimizing Fertigated Nitrogen Rates for Young Southern Highbush Blueberry. Scientia Horticulturae (submitted) 
  2. Jiang, Z.-Y. Y. Zhong, J. Zheng, M. Ali, G.D. Liu, X.-L. Zheng. 2018. L-ascorbic acid metabolism in an ascorbate-rich kiwifruit (Actinidia. Eriantha Benth.) cv. ‘White’ during postharvest. Plant Physiology and Biochemistry 124: 20-28.
  3. Bera, T., E. S. McLamore, B. Wasik, B. Rathinasabapath, G.D. Liu, 2018. Identification of a maize (Zea mays L.) inbred line adapted to low-P conditions via analyses of phosphorus utilization, root acidification, and calcium influx. Journal of Plant Nutrition and Soil Science 181(2): (DOI: 10.1002/jpln.201700319). 
  4. Zhou, Q., B. A. Houge, Z. Tong, B. Gao, and  G.D. Liu. 2018. An in-situ Technique for Producing Low-Cost Agricultural Biochar. Pedosphere (in press)
  5. Fang, Y. J. Williamson, R. Darnell, Y.C. Li, and G.D. Liu, 2017. Nitrogen Uptake and Allocation at Different Growth Stages of Young Southern Highbush Blueberry Plants. HortScience 52:905-909 
  6. Zhu, Q., M. Ozores-Hampton, Y.C. Li, K.Morgan, G.D. Liu, and R. S. Mylavarapu. 2017. Effect of Phosphorus Rates on Growth, Yield, and Postharvest Quality of Tomato in a Calcareous Soil. HortScience 52(10): 1406-1412.
  7. Zhu, Q., M.Ozores-Hampton, Y.C. Li, K. Morgan, G.D. Liu, and R.S. Mylavarapu. 2017. Responses of Tomato to Potassium Rates in a Calcareous Soil. HortScience 52(5): 764-769.
  8. Balal, R.M., M.A. Shahid, M.M., C. Vincentc, L. Zotarellib, G.D. Liu,, N. S. Mattson, B. Rathinasabapathi, J.J. Martínez-Nicolase. 2017. Kinnow mandarin plants grafted on tetraploid rootstocks are more tolerant to Cr-toxicity than those grafted on its diploids one. Environmental and Experimental Botany 140: 8-18.
  9. Balal, R.M., M.A. Shahid, M.M. Javaid, Z. Iqbal, G.D. Liu, L. Zotarelli, N. Khan. 2017. Chitosan alleviates phytotoxicity caused by boron through augmented polyamine metabolism and antioxidant activities and reduced boron concentration in Cucumis sativus L. Acta Physiologiae Plantarum 39: 31.
  10. Xiaolin Liao, Ben Hogue, Shouliang Zhu, Zhaohui Tong, G.D. Liu and Yuncong Li, 2016. Using Bioethanol Wastes as an Alternative Phosphorus Source for Snap Bean and Radish Production. American Journal of Environmental Sciences 12(1):1-7.
  11. Qasim A. Thani, Bruce Schaffer, G.D. Liu, Ana I. Vargas, Jonathan H. Crane. 2016. Chemical oxygen fertilization reduces stress and increases recovery and survival of flooded papaya (Carica papaya L.) plants. Scientia Horticulturae 202: 173-183..
  12. L.R. Rens, L. Zotarelli, A. Alva, D.L.Rowland, G.D. Liu, K.T. Morgan. 2016. Fertilizer Nitrogen Uptake Efficiencies for Potato as Influenced by Application Timing. Nutrient Cycling in Agroecosystems 104: 175-185.
  13. Xiaolin Liao, Zhihua Su, G.D. Liu, Lincoln Zotarelli, Yuqi Cui, Crystal Snodgrass. 2016. Impact of soil moisture and temperature on potato production using seepage and center pivot irrigationAgricultural Water Management 165(1): 230-236. DOI: 10.1016/j.agwat.2015.10.023.
  14. Sun Qian, Weimin Ding, Yuncong Li, G.D. Liu, Jiuai Sun & Qishuo Ding. 2015. Characterization of Humic Acids Derived From Leonardite Using a Solid-State NMR Spectrocopy and Effects of Humic Acids on Growth and Nutrient Uptake of Snap Bean. Chemical Speciation & Bioavailability 27(4): 156-161.
  15. Liao, X., G.D. Liu, Benjamin Hogue, and Yuncong Li. 2015. Phosphorus Availability and Environmental Risk in Potato Fields in North Florida. Soil Use and Management 31(2): 308-312.
  16. Liu, G.D., K. Morgan, B. Hogue, Y.C. Li, D. Sui. 2015. Improving Phosphorus Use efficiency for Snap Bean Production by optimizing Application Rate. Horticultural Science 42: 94-101.
  17. Fred Fishel and G.D. Liu. 2014. Conducting a Statewide Dual-Purpose Program for Pesticide Applicators and County Extension Agents. Journal of Extension 52(5): 1-6.
  18. Letian Wang*, Zhaohui Tong, G.D. Liu, Yuncong Li. 2014. Characterization of Biorefinery Residues Used as Sandy Soil Amendments. Chemosphere 107: 354-359.
  19. Liu, G.D., D. Marshall Porterfield. 2014. Oxygen enrichment with magnesium peroxide for minimizing hypoxic stress of flooded corn. Journal of Plant Nutrition and Soil Science 177: 733-740.
  20. Liu, G.D., Y.C. Li, and A. K. Alva. 2014. Comparing Gibbs Energy Relationships for Ammonia Volatilizations from Agricultural Soils for Potato Production. American Journal of Environmental Sciences 10(1): 19-25.
  21. W.C. Lee, G.D. Liu and Ashok Alva. 2013. Potato Cultivar Evaluation for Phosphorus-Use Efficiency.Journal of Crop Improvement 27(5): 617-626.
  22. Liu, G.D., Y.C. Li,K. Migliaccio, T. Olczyk,A. K. Alva. 2013. Oxygen Fertilization improves Growth and Nitrogen-Use Efficiency of Flooded Italian Basil (Ocimum Basilicum L.). International Journal of Vegetable Science. 19 (3): 217-227.
  23. Johannes M.S. Scholberg, Lincoln Zotarelli, Michael D. Dukes, Monica Ozores-Hampton; G.D. Liu, Pablo Tittonell. 2013. Enhancing Fertilizer Efficiency in High Input Cropping Systems in Florida. Sustainable Agriculture Review 12: 143 - 174.
  24. Liu, G.D., D. Marshall Porterfield, Y.C. Li,and Waldemar Klassen. 2012. Increased Oxygen Bioavailability Improved Vigor and Germination of Aged Vegetable Seeds. HortScience 47(12): 1714-1721.
  25. Liu, G.D.,Y.C. Li, A. K. Alva, D. M. Porterfield, andJ. Dunlop. 2012. Enhancing nitrogen efficiency of potato and cereal crops by optimizing temperature, moisture, balanced nutrients, and oxygen bioavailability. Journal of Plant Nutrition. 35:428–411, 2012.
  26. Liu, G.D.,Y.C. Li, andA. K. Alva. 2012. Water potential vs. pressure in relation to water movement and transpiration in plants. International journal of Agronomy and Plant Production.3: 369-373.
  27. Liu, G.D.,Y.C. Li, andA. K. Alva. 2011. Identification of factors most important for ammonia emission from fertilized soils for potato production using principal component analysis. Journal of Sustainable Watershed Science and Management - ISSN 1949-1425. 1: 21-30.
  28. Liu, G. D.,Y. C. Li, R. Muñoz-Carpena, M. Hedgepeth, Y. S. Wan, And R. Roberts. 2011. Growth of Bald Cypress [Taxodium Distichum (L.) Rich.] Seedlings in the Tidal Floodplain of The Loxahatchee River. Florida Scientist. 74: 84- 99. 
  29. Liu, G.D., B. Gu, S.L. Miao,  Y.C. Li, K.W. Miliaccio, and Y. Qian. 2010. Phosphorus release from ash and remaining tissues of two wetland species after a prescribed fireJournal of Environmental Quality. 39:1585–1593.
  30. Y. Ouyang, J. E. Zhang, D. Lin and G.D. Liu. 2010. A STELLA model for the estimation of atrazine runoff, leaching, adsorption, and degradation from an agricultural land.Journal of Soils and Sediments 10: 263-271.
  31. Liu, G.D., D. M. Porterfield, and Y.C. Li. 2009. Genotypic differences in K-efficiency of three-way cross hybrid indica rice. Communications in Soil Sciences and Plant Analysis. 40: 1803-1821.
  32. Liu, G.D., Y.C. Li, M. Hedgepeth, Y. Wan and R.E. Roberts. 2009. Seed germination enhancement for bald cypress (Taxodium distichum [L.] Rich.). J. Horticulture and Forestry 1(2):22-26.
  33. Liu, G.D., J. Dunlop, T. Phung, and Y. C. Li. 2007. Physiological Responses of Wheat Phosphorus-efficient and -inefficient Genotypes in Field and Effects of Mixing Other Nutrients on Mobilization of Insoluble Phosphates in Hydroponics. Communications in Soil Science and Plant Analysis. 38: 2239-2256.
  34. Liu, G.D., Y.C. Li, and A. K. Alva. 2007. High water regime can reduce ammonia volatilization from soils. Communications in Soil Science and Plant Analysis. 38: 1203-1220. DOI: 10.1080/00103620701328289.
  35. Liu, G.D., Y.C. Li, and A. K. Alva. 2007. Moisture Quotients for Ammonia Volatilization from Four Soils in Potato Production Regions. Water, Air & Soil Pollution. 183: 115-127. DOI: 10.1007/s11270-007-9361-9.
  36. Liu, G.D., Y.C. Li, and A. K. Alva. 2007. Temperature quotients of ammonia emission of different nitrogen sources applied to four agricultural soils. Soil Science Society of America Journal. 71:1482-1489. DOI: 10.2136/sssaj2006.0221.
  37. Liu, G.D., Dunlop James and Phung Thai. 2006.  Induction of Root Hair Growth in a Phosphorus-Buffered Culture SolutionAgricultural Sciences in China. 5: 370-376.
  38. Liao, J., G.D. Liu, and O. Monje and D. M. Porterfield. 2004. Induction of hypoxic root metabolism results from physical limitations in O2 bioavailability in mircogravity. Advances in Space Research. 34: 1579-1584.

EDIS pubs:

  1. Liu, G.D., C.F. Miller, B. Wells, Y.C. Li, Q. Wang. 2017. Asian Vegetable Production. Chapter 5. Vegetable Production Handbook of Florida, 2017-2018. Page 31. http://edis.ifas.ufl.edu/pdffiles/cv/cv29200.pdf
  2. Rao Mylavarapu, George Hochmuth, and G.D. Liu. 2017. UF/IFAS Standardized Nutrient Recommendations for Vegetable Crop Production in Florida. http://edis.ifas.ufl.edu/pdffiles/CV/CV00200.pdf 
  3. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Tomato Production in Miami-Dade County, Florida. HS858. http://edis.ifas.ufl.edu/tr014
  4. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Okra Production in Miami-Dade County, Florida. HS857. http://edis.ifas.ufl.edu/tr009
  5. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Eggplant Production in Miami-Dade County, Florida. HS856. http://edis.ifas.ufl.edu/tr008
  6. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Cucumber Production in Miami-Dade County, Florida. HS855. http://edis.ifas.ufl.edu/tr007
  7. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Cabbage Production in Miami-Dade County, Florida. HS854. http://edis.ifas.ufl.edu/tr006
  8. Y. C. Li, W. Klassen, M. Lamberts, T. Olczyk, and G.D. Liu. 2017. Sweet Corn Production in Miami-Dade County, Florida. HS862. http://edis.ifas.ufl.edu/tr013
  9. John R. Duval, Eric Simonne, and G.D. Liu. 2017. Water Movement in Strawberry Beds. HS912. http://edis.ifas.ufl.edu/hs145
  10. Yucong Xie, Liu, G.D., Yuncong Li, and Kati Migliaccio. 2016. Luffa—an Asian Vegetable Emerging in Florida. #HS1285.http://edis.ifas.ufl.edu/hs1285
  11. Liu, G.D., Yuncong Li, Kimberly Moore, and Kim Gabel. 2016. Pond Apple—A Tree Species Adapted to Salt Stress. Publication #HS1281. http://edis.ifas.ufl.edu/hs1281  
  12. Liu, G.D.,  Yuncong Li, Kimberly Moore, Kim Gabel, Lei Wu, and Rafael Muñoz-Carpena. 2016.  How to Chemigate Salinity-Stressed Plants with Hydrogen Peroxide to Increase Survival and Growth Rates. Publication #HS1280. https://edis.ifas.ufl.edu/hs1280
  13. Liu, G.D., Qingren Wang, Bonnie Wells, Yuncong Li, and David Dinkins . 2016. Tong Hao—an Asian Vegetable Emerging in Florida. Publication #HS1276. http://edis.ifas.ufl.edu/hs1276
  14. Liu, G.D., Yuncong Li, and Xiangju Fu. 2015. Practices to Minimize Flooding Damage to Commercial Vegetable Production. Publication #: SL 206. https://edis.ifas.ufl.edu/ss425 
  15. Liu, G.D., Yuncong Li, David Dinkins, Bonnie Wells, Qingren Wang, and Yuqi Cui. 2015. Long Squash – An Asian Vegetable Emerging in Florida. Publication #: HS 1272. https://edis.ifas.ufl.edu/hs1272.
  16. Liu, G.D., Qingren Wang, Yuncong Li, David Dinkins, Bonnie Wells, and Yuqi Cui. 2015. Bitter melon – an Asian vegetable emerging in Florida. Publication #: HS 1271. https://edis.ifas.ufl.edu/hs1271.
  17. Qingren Wang, G.D. Liu, Kelly Morgan, Yuncong Li. 2015. Implementing Four Rs (4Rs) in Nutrient Stewardship for Tomato Production. Publication #: HS 1269. https://edis.ifas.ufl.edu/hs1269.
  18. Khatri, K., G.D. Liu, Qingren Wang, Yuncong Li, David Dinkins, and Bonnie Wells. 2015. Long BeanAn Asian Vegetable Emerging in Florida. Publication #: HS 1268. https://edis.ifas.ufl.edu/hs1268.
  19. Liu, G.D., Kelly Morgan, Yuncong Li, Lincoln Zotarelli, James DeValerio, and Qingren Wang. 2015. What is 4R nutrient stewardship? Publication #: HS 1264. https://edis.ifas.ufl.edu/hs1264 
  20. Liu, G.D., L. Zotarelli, Y. Li, D. Dinkins, Q. Wang, and M. Ozores-Hampton. 2014. Controlled-release and slow-release fertilizers as nutrient management tools. Publication #: HS 1255. http://edis.ifas.ufl.edu/hs1255
  21. Liu, G.D., R. Mylavarapu, E. Hanlon, and gW.C. Lee. 2014. Soil pH Management for Optimum Commercial Fruit Production in Florida. Publication #: HS 1234. http://edis.ifas.ufl.edu/hs1234.
  22. Liu, G.D., and J. Williamson. 2013. What is urea-triazone nitrogen? Publication #: HS 1233. http://edis.ifas.ufl.edu/hs1233.
  23. Liu, G.D., M. Ozores-Hampton, G. McAvoy, fB. Hogue, and C. Snodgrass. 2013. Application of surfactants in commercial crop production for water and nutrient management in sandy soil. Publication #: HS 1230. http://edis.ifas.ufl.edu/hs1230
  24. Liu, G.D., Y.C. Li, and A. Gazula. 2013. Conversions of parts per million on soil test reports to lb/acre. Publication #: HS 1229. http://edis.ifas.ufl.edu/hs1229
  25. Liu, G.D., E. Hanlon, and Y.C. Li. 2012. Understanding and applying chelated fertilizers effectively based on soil pH. Publication #: HS 1208. http://edis.ifas.ufl.edu/hs1208
  26. Liu, G.D. and E. Hanlon. 2012. Soil pH range for optimum commercial vegetable production. Publication #: HS 1207. http://edis.ifas.ufl.edu/hs1207
  27. Liu, G.D. and G. McAvoy. 2012. How to reduce clogging problems in fertigation. Publication #: HS 1202. http://edis.ifas.ufl.edu/hs1202
  28. Liu, G.D., D. Sui, and G.K. England. 2012. How to convert liquid fertilizer into dry fertilizer in fertigation for commercial vegetable and fruit crop production. Publication #: HS 1200. http://edis.ifas.ufl.edu/hs1200
  29. Liu, G.D., J. Williamson, G. England, and A. Whidden. 2012. How to calculate fertigation injection rates for commercial blueberry production. Publication #: HS 1197.  http://edis.ifas.ufl.edu/hs1197
  30. Liu,G.D., David Sui, and Gary K. England. 2012.How to Convert Liquid Fertilizer into Dry Fertilizer in Fertigation for Commercial Vegetable and Fruit Crop Production. http://edis.ifas.ufl.edu/hs1200
  31. Liu,G.D., Jeffrey Williamson, Gary England, and Alicia Whidden. 2012. How to Calculate Fertigation Injection Rates for Commercial Blueberry production. http://edis.ifas.ufl.edu/hs1197
  32. Asha M. Brunings, G.D. Liu, Eric H. Simonne, Shouan Zhang, Yuncong Li, and Lawrence E. Datnoff. 2012. Are Phosphorous and Phosphoric Acids Equal PhosphorusSources for Plant Growth?http://edis.ifas.ufl.edu/hs254
  33. G. D. Liu,E. H. Simonne, and G.J. Hochmuth. 2012. Soil and Fertilizer Management for Vegetable Production in Florida. http://edis.ifas.ufl.edu/cv101
  34. M.D. Dukes, L. Zotarelli, G.D. Liu, and E.H. Simonne. 2012. Principles and Practices of Irrigation Management for Vegetables. http://edis.ifas.ufl.edu/cv107
  35. Liu, G.D., E.H. Simonne, and Y.C. Li. 2011. Nickel Nutrition of Plants. Publication #: HS 1191. http://edis.ifas.ufl.edu/hs1191
  36. Liu,G.D., Eric H. Simonne, Yuncong Li, Chad M. Hutchinson, Mark Warren and Steven Lands. 2011. Controlled-Release Fertilizer Opportunities and Costs for Potato Production in Florida. http://edis.ifas.ufl.edu/hs187


  1. Liu, G.D.  2016. Asian Vegetable Crops Emerging Rapidly in Florida. Vegetable and Specialty Crop News. http://vscnews.com/asian-vegetables-rapidly-emerging-florida/  
  2. Fu, X., G.D. Liu, Lincoln Zotarelli, Steven Sargent, Crystal Snodgrass, and Alan Jones. 2016. Fertigation for Potato Production in Florida. http://hos.ufl.edu/newsletters/vegetarian/issue-no-614
  3. Liu, G.D.  Frederick Fishel, and Kelly Morgan. 2016. New Technology for Commercial Crop Production (IV) IST Summary. The Vegetarian Newsletter. Issue Number 610. http://hos.ufl.edu/newsletters/vegetarian/issue-no-610
  4. Cui, Y., G.D. Liu,  L. Zotarelli, S. Sargent, D. Dinkins. 2015. Sustainable Phosphorus and Gypsum Management for Potato ‘Atlantic’ Production in Northeast Florida. The Vegetarian Newsletter. Issue Number 603. http://hos.ufl.edu/newsletters/vegetarian/issue-no-603
  5. Liu, G.D.  Frederick Fishel, and Kelly Morgan. 2015. New Technology for Vegetable Production (III) IST Summary. The Vegetarian Newsletter. Issue Number 601. http://hos.ufl.edu/newsletters/vegetarian/issue-no-601
  6. X. Liao, G.D. Liu, L. Zotarelli, C. Snodgrass, A. Jones. 2014. Water Savings of Center-Pivot Irrigation for Commercial Snap Bean Production in Southwest Florida. The Vegetarian Newsletter. Issue Number 593. http://hos.ufl.edu/newsletters/vegetarian/issue-no-593
  7. Liu, G.D. and F. Fishel. 2014. New technology for vegetable production IST summary. The Vegetarian Newsletter. Issue Number 589. http://hos.ufl.edu/newsletters/vegetarian/issue-no-589.
  8. Liu, G.D. and fB. Hogue. 2013. Surfactant increases yield of tomato grown on sandy soil in Florida. The Vegetarian Newsletter. Issue Number 584. http://hos.ufl.edu/newsletters/vegetarian/issue-no-584.
  9. Salame-Donoso, T., G.D. Liu, B. Santos, and L. Zotarelli. 2013. Seepage versus central-pivot irrigation for potato production in Manatee County. The Vegetarian Newsletter. Issue Number 584. http://hos.ufl.edu/newsletters/vegetarian/issue-no-584.
  10. Liu, G.D. 2013. Overcoming salinity barriers to crop production in Florida IST summary. The Vegetarian Newsletter. Issue Number 583. http://hos.ufl.edu/newsletters/vegetarian/issue-no-583.
  11. Gazula, A., E. Simonne, and G.D. Liu. 2013. Fertigation and irrigation management of blueberries. Blueberry Newsletter 2(2): 18-24.
  12. Liu, G.D., fB. Hogue, S. Lands, D. Dinkins, and S. Sargent. 2013. Gypsum rate trial on potato yield and quality. University of Florida IFAS Extension Tri-County Commercial Ag Newsletter. 3(3): 9-11.
  13. Liu, G.D., D. Sui, and Y.C. Li. 2012. Optimizing phosphorus rate is imperative for improving the sustainability of commercial snap bean production in South Florida. The Vegetarian Newsletter. Issue Number 575. http://hos.ufl.edu/newsletters/vegetarian/issue-no-575.
  14. Liu, G.D. 2012. Advice for selecting nitrogen fertilizers to manage soil pH in the root zone of fruit and vegetable crops. The Vegetarian Newsletter. Issue Number 573. http://hos.ufl.edu/newsletters/vegetarian/issue-no-573.  
  15. Liu, G.D. 2012. Too much calcium reduces phosphorus bioavailability in soil. University of Florida IFAS Extension Tri-County Commercial Ag Newsletter. 2(5): 5.

since December 19, 2016