Dr Bernhard Wehr
Research Fellow
School of Agriculture and Food Sustainability
Hartley Teakle Building (83), Room N209, St Lucia Campus
Teaching and Development
- LAND2003 The Soil Environment
Researcher biography
Acid soil, Aluminium toxicity, soil acidity, rhizosphere, plant roots, root growth, plant cell wall, nutrient uptake, plant nutrition
Having completed my B.Sc. majoring in Biochemistry, Microbiology and Chemistry, I completed my M.Sc. (Agric) in Horticultural Science. After completing a PhD on the effect of heavy metals and aluminium on plant root biochemistry, I have worked for various plant biotechnology companies, focussing on genetic engineering of crops, in-vitro growth, propagation systems and salinity tolerant tree crops. After rejoining the University, I have been involved in minesite rehabilitation, focussing on plant-soil-water relationships. I have completed and ARC funded research on Al toxicity, focussing on the hydrolysis of Al in plant roots. I am currently researching the effect of coal seam water application and the movement of salts in soils. I am also teaching the introductory Soil Science course to undergraduate students.
Publications
Book Chapters
Wehr, Johannes Bernhard , Blamey, Frederick Paxton Cardell , Kopittke, Peter Martin and Menzies, Neal William (2020). Aluminum. Managing global resources and universal processes. (pp. 155-174) edited by Brian D. Fath and Sven Erik Jorgensen. Boca Raton, FL, United States: CRC Press/Routledge.
Wehr, Johannes Bernhard, Blamey, Frederick Paxton Cardell and Menzies, Neal William (2017). Aluminum. Encyclopaedia of soil science. (pp. 105-110) edited by Lal Rattan. New York, United States: CRC Press (Taylor and Francis).
Wehr, Johannes Bernhard, Blamey, Frederick Paxton Cardell and Menzies, Neal William (2017). Aluminum. Encyclopedia of Soil Science. (pp. 105-110) edited by R. Lal. Boca Raton, FL United States: CRC Press. doi: 10.1081/E-ESS3-120025114
Blamey, F. Pax C., Kopittke, Peter M., Wehr, J. Bernhard and Menzies, Neal W. (2015). Aluminum. Handbook of Plant Nutrition. (pp. 567-606) edited by Allen V. Barker and David J. Pilbeam. Boca Raton Florida, United States: CRC Press. doi: 10.1201/b18458-21
Wehr, J. B., Blamey, F. P. C. and Menzies, N. W. (2012). Aluminum. Encyclopedia of Environmental Management. (pp. 269-278) edited by Sven Erik Jorgenson. Boca Raton: CRC Press.
Journal Articles
McKenna, Brigid A., Wehr, J. Bernhard and Kopittke, Peter M. (2024). Quantifying online engagement at three levels of undergraduate study. Cogent Education, 11 (1) 2345939. doi: 10.1080/2331186x.2024.2345939
Niaz, Sara, Wehr, J. Bernhard, Dalal, Ram C., Kopittke, Peter M. and Menzies, Neal W. (2023). Wetting and drying cycles, organic amendments, and gypsum play a key role in structure formation and stability of sodic Vertisols. SOIL, 9 (1), 141-154. doi: 10.5194/soil-9-141-2023
Wehr, J. Bernhard, Dalzell, Scott A. and Menzies, Neal W. (2023). Predicting and modelling availability of fluoride in soil from sorption properties. Soil Use and Management, 39 (1), 521-534. doi: 10.1111/sum.12854
Niaz, Sara, Wehr, J. Bernhard, Dalal, Ram C., Kopittke, Peter M. and Menzies, Neal W. (2022). Organic amendments and gypsum reduce dispersion and increase aggregation of two sodic Vertisols. Geoderma, 425 116047, 1-12. doi: 10.1016/j.geoderma.2022.116047
Nguyen, Binh Thi, Harper, Stephen M., O'Hare, Tim J., Menzies, Neal W. and Wehr, Bernhard (2022). Sulfur nutrition affects garlic bulb yield and allicin concentration. Plants, 11 (19) 2571, 2571. doi: 10.3390/plants11192571
Nguyen, B.T., Hong, H.T., O’Hare, T.J., Wehr, J.B., Menzies, N.W. and Harper, S.M. (2021). A rapid and simplified methodology for the extraction and quantification of allicin in garlic. Journal of Food Composition and Analysis, 104 104114, 1-7. doi: 10.1016/j.jfca.2021.104114
Page, Kathryn L., Dang, Yash P., Martinez, Cristina, Dalal, Ram C., Wehr, J. Bernhard, Kopittke, Peter M., Orton, Thomas G. and Menzies, Neal W. (2021). Review of crop‐specific tolerance limits to acidity, salinity and sodicity for seventeen cereal, pulse, and oilseed crops common to rainfed subtropical cropping systems. Land Degradation and Development, 32 (8), 2459-2480. doi: 10.1002/ldr.3915
Wehr, J. Bernhard and Kirchhof, Gunnar (2021). Gamma irradiation with 50 kGy has a limited effect on agronomic properties of air-dry soil. Soil Systems, 5 (2) 28, 28. doi: 10.3390/soilsystems5020028
Li, Zhigen, Wehr, J. Bernhard, Wang, Peng, Menzies, Neal W. and Kopittke, Peter M. (2020). Understanding the delayed expression of Al resistance in signal grass (Urochloa decumbens). Annals of Botany, 125 (5), 841-850. doi: 10.1093/aob/mcz206
Wehr, J. Bernhard, Lewis, Tom, Dalal, Ram C., Menzies, Neal W., Verstraten, Luke, Swift, Scott, Bryant, Philippa, Tindale, Neil and Smith, Tim E. (2020). Soil carbon and nitrogen pools, their depth distribution and stocks following plantation establishment in south east Queensland, Australia. Forest Ecology and Management, 457 117708, 117708. doi: 10.1016/j.foreco.2019.117708
Lewis, Tom, Verstraten, Luke, Hogg, Bruce, Wehr, Bernhard J., Swift, Scott, Tindale, Neil, Menzies, Neal W., Dalal, Ram C., Bryant, Philippa, Francis, Ben and Smith, Timothy E. (2019). Reforestation of agricultural land in the tropics: The relative contribution of soil, living biomass and debris pools to carbon sequestration. Science of the Total Environment, 649, 1502-1513. doi: 10.1016/j.scitotenv.2018.08.351
Page, K. L., Dalal, R. C., Wehr, J. B., Dang, Y. P., Kopittke, P. M., Kirchhof, G., Fujinuma, R. and Menzies, N. W. (2018). Management of the major chemical soil constraints affecting yields in the grain growing region of Queensland and New South Wales, Australia – a review. Soil Research, 56 (8), 765-779. doi: 10.1071/sr18233
Wehr, J. Bernhard, Smith, Tim E. and Menzies, Neal W. (2017). Influence of soil characteristics on teak (Tectona grandis L. f.) establishment and early growth in tropical Northern Australia. Journal of Forest Research, 22 (3), 153-159. doi: 10.1080/13416979.2017.1283976
McKenna, Brigid A., Wehr, J. Bernhard, Mikkelsen, Deirdre, Blamey, F. Pax C. and Menzies, Neal W. (2016). Aluminium effects on mechanical properties of cell wall analogues. Physiologia Plantarum, 158 (4), 382-388. doi: 10.1111/ppl.12472
Wang, Peng, Liu, Yunjia, Menzies, Neal W., Wehr, J. Bernhard, de Jonge, Martin D., Howard, Daryl L., Kopittke, Peter M. and Huang, Longbin (2016). Ferric minerals and organic matter change arsenic speciation in copper mine tailings. Environmental Pollution, 218, 835-843. doi: 10.1016/j.envpol.2016.08.007
Wehr, J. B., Kopittke, P. M., Dalzell, S. A. and Menzies, N. W. (2016). Germination of leucaena and Rhodes grass seeds in saline and alkaline conditions. Seed Science and Technology, 44 (3), 1-14. doi: 10.15258/sst.2016.44.3.06
Lewis, Tom, Smith, Timothy E., Hogg, Bruce, Swift, Scott, Verstraten, Luke, Bryant, Phillipa, Wehr, Bernhard J., Tindale, Neil, Menzies, Neal W and Dalal, Ram C. (2016). Conversion of sub-tropical native vegetation to introduced conifer forest: impacts on below-ground and above-ground carbon pools. Forest Ecology and Management, 370, 65-75. doi: 10.1016/j.foreco.2016.03.058
Cicchelli, Federico D. F., Wehr, J. Bernhard, Dalzell, Scott A., Li, Cui, Menzies, Neal W. and Kopittke, Peter M. (2016). Overhead-irrigation with saline and alkaline water: deleterious effects on foliage of Rhodes grass and leucaena. Agricultural Water Management, 169, 173-182. doi: 10.1016/j.agwat.2016.03.002
Wehr, J. Bernhard, Blamey, F. Pax C., Smith, Tim E. and Menzies, Neal W. (2016). Growth and physiological responses of teak (Tectona grandis Linn. f.) clones to Ca, H and Al stresses in solution and acid soils. New Forests, 48 (1), 1-16. doi: 10.1007/s11056-016-9560-6
Scholz, Lisa M., Kopittke, Peter M., Menzies, Neal W., Dalzell, Scott A., Macfarlane, David C. and Wehr, J. Bernhard (2015). Use of Fluoride-Containing Water for the Irrigation of Soil - Plant Systems. Journal of Agricultural and Food Chemistry, 63 (19), 4737-4745. doi: 10.1021/acs.jafc.5b01001
Blamey, F. Pax C., Wehr, J. Bernhard, Wang, Peng, Menzies, Neal W. and Kopittke, Peter M. (2014). Kinetics and mechanisms of cowpea root adaptation to changes in solution calcium. Plant and Soil, 379 (1-2), 301-314. doi: 10.1007/s11104-014-2065-1
Kopittke, Peter M., Menzies, Neal W., Wang, Peng, McKenna, Brigid A., Wehr, J. Bernhard, Lombi, Enzo, Kinraide, Thomas B. and Blamey, F. Pax C. (2014). The rhizotoxicity of metal cations is related to their strength of binding to hard ligands. Environmental Toxicology and Chemistry, 33 (2), 268-277. doi: 10.1002/etc.2435
Kopittke, Peter M., Wehr, J. Bernhard and Menzies, Neal W. (2012). Does formative assessment improve student learning and performance in soil science?. Journal of Natural Resources and Life Sciences Education, 41 (1), 59-64. doi: 10.4195/jnrlse.2012.0001
Blamey, F. P. C., Kopittke, P. M., Wehr, J. B. and Menzies, N. W. (2011). Recovery of cowpea seedling roots from exposure to toxic concentrations of trace metals. Plant and Soil, 341 (1-2), 423-436. doi: 10.1007/s11104-010-0655-0
Blamey, F. Pax C., Kopittke, Peter M., Wehr, J. Bernhard, Kinraide, Thomas B. and Menzies, Neal W. (2010). Rhizotoxic effects of silver in cowpea seedlings. Environmental Toxicology and Chemistry, 29 (9), 2072-2078. doi: 10.1002/etc.236
Wehr, J. Bernhard, Blamey, F. Pax C., Kopittke, Peter M. and Menzies, Neal W. (2010). Comparative hydrolysis and sorption of Al and La onto plant cell wall material and pectic materials. Plant and Soil, 332 (1-2), 319-330. doi: 10.1007/s11104-010-0297-2
McKenna, Brigid A., Nicholson, Timothy M., Wehr, J. Bernhard and Menzies, Neal W. (2010). Effects of Ca, Cu, Al and La on pectin gel strength: Implications for plant cell walls. Carbohydrate Research, 345 (9), 1174-1179. doi: 10.1016/j.carres.2010.03.044
Wehr, J. Bernhard, Blamey, F. P. C., Hanna, J. V., Kopittke, P. M, Kerven, G. L. and Menzies, N. W. (2010). Hydrolysis and speciation of Al bound to pectin and plant cell wall material and its reaction with the dye chrome azurol S. Journal of Agricultural and Food Chemistry, 58 (9), 5553-5560. doi: 10.1021/jf100201x
Wehr, J. Bernhard, Blamey, F. Pax C. and Menzies, Neal W. (2010). Comparison between methods using copper, lanthanum, and colorimetry for the determination of the cation exchange capacity of plant cell walls. Journal of Agricultural and Food Chemistry, 58 (8), 4554-4559. doi: 10.1021/jf100097k
McKenna, BA, Kopittke, PM, Wehr, JB, Blamey, FPC and Menzies, NW (2010). Metal ion effects on hydraulic conductivity of bacterial cellulose-pectin composites used as plant cell wall analogs. Physiologia Plantarum, 138 (2), 205-214. doi: 10.1111/j.1399-3054.2009.01306.x
McKenna, Brigid A., Mikkelsen, Deirdre, Wehr, J. Bernhard, Gidley, Michael J. and Menzies, Neal W. (2009). Mechanical and structural properties of native and alkali-treated bacterial cellulose produced by Gluconacetobacter xylinus strain ATCC53524. Cellulose, 16 (6) 1047, 1047-1055. doi: 10.1007/s10570-009-9340-y
Kopittke, P. M., McKenna, B. A., Blamey, F. P. C., Wehr, J. B. and Menzies, N. W. (2009). Metal-induced cell rupture in elongating roots is associated with metal ion binding strengths. Plant and Soil, 322 (1), 303-315. doi: 10.1007/s11104-009-9917-0
Wehr, J. B., Fulton, I. and Menzies, N. W. (2006). Revegetation strategies for bauxite refinery residue: A case study of Alcan Gove in Northern Territory, Australia. Environmental Management, 37 (3), 297-306. doi: 10.1007/s00267-004-0385-2
Wehr, J. B., So, H. B., Menzies, N. W. and Fulton, I. (2005). Hydraulic properties of layered soils influence survival of Rhodes grass (Chloris gayana Kunth.) during water stress. Plant and Soil, 270 (1), 287-297. doi: 10.1007/s11104-004-1651-z
Wehr, J. B., Menzies, N. W. and Blamey, F. P. C. (2004). Inhibition of cell-wall autolysis and pectin degradation by cations. Plant Physiology And Biochemistry, 42 (6), 485-492. doi: 10.1016/j.plaphy.2004.05.006
Wehr, J. B., Menzies, N. W. and Blamey, F. P. C. (2004). Alkali hydroxide-induced gelation of pectin. Food Hydrocolloids, 18 (3), 375-378. doi: 10.1016/S0268-005X(03)00124-3
Wehr, J. B., Menzies, N. W. and Blamey, F. P. C. (2003). Model studies on the role of citrate, malate and pectin esterification on the enzymatic degradation of Al- and Ca-pectate gels: possible implications for Al-tolerance. Plant Physiology and Biochemistry, 41 (11-12), 1007-1010. doi: 10.1016/j.plaphy.2003.06.001
Wehr, J. B. (1995). Agmatine determination in plant material: Aspects of the benzoylation and high performance liquid chromatographic analysis. Phytochemical Analysis, 6 (5), 244-250. doi: 10.1002/pca.2800060504
Conference Papers
Nguyen, Binh , Wehr, Bernhard , O'Hare, Timothy , Menzies, Neal , Hong, Hung and Harper, Stephen (2022). Benchmarking mineral concentration, bulb yield and quality across garlic genotypes. TropAg International Agriculture Conference, Brisbane, Australia, 31 October - 2 November 2022.
Jeffrey, Yapo, Sirabis, William, Atung, Cyril, Ramakrishna, Akkinapally, Wehr, Bernhard, Menzies, Neal and Kirchhof, Gunnar (2021). Soil fertility management techniques for increased sweetpotato root yield in Papua New Guinea (PNG) highlands. The Soil Science Australia and the New Zealand Society of Soil Science Joint Conference, Cairns, QLD Australia, 27 June - 2 July 2021.
Gersekowski, Caitlin and Wehr, Bernhard (2021). Influence of rock dusts on C and N cycling in soils during a composting trial.. The Soil Science Australia and the New Zealand Society of Soil Science Joint Conference, Cairns, QLD Australia, 27 June-2 July 2021.
Yeffrey, Yapo, Sirabis, William, Wehr, Bernhard, Menzies, Neal and Kirchhof, Gunnar (2021). Sweetpotato yield comparison from pathogen tested and non-pathogen tested vines with coffee pulp in the PNG Highlands. The Soil Science Australia and the New Zealand Society of Soil Science Joint Conference., Cairns, QLD Australia, 27 June - 2 July 2021.
Nguyen, Binh, Dang, Ha, Pham, Phuong, Chu, My, Nguyen, Duyen, Phan, Hien, Wehr, Bernhard and Harper, Stephen (2021). Excess nitrogen application reduces root yield of Achyranthes bidentata. The Soil Science Australia and the New Zealand Society of Soil Science Joint Conference, Cairns, QLD Australia, 27 June - 2 July 2021.
Nguyen, Binh, Wehr, Bernhard, O'Hare, Timothy, Hong, Hung Trieu, Menzies, Neal and Harper, Stephen (2019). Allicin and yield: are they friends or enemies?. TropAg2019, Brisbane, QLD, Australia, 11-13 November 2019.
Nguyen, Binh, Wehr, Bernhard, O’Hare, Timothy, Hong, Hung, Menzies, Neal and Harper, Stephen (2019). The relationship between bulb yield and allicin concentration in garlic varieties. Third International Tropical Agriculture Conference (TROPAG 2019), Brisbane, QLD, Australia, 11 - 13 November 2019. Basel, Switzerland: M D P I AG. doi: 10.3390/proceedings2019036028
Choong, Jie Sheng, Wehr, Bernhard, Fujinuma, Ryo and Martinez, Cristina (2017). Effect of NatraMin soil conditioner on physical, chemical and biological soil properties in a glasshouse trial. TropAg2017, Brisbane, 22-22 Nov 2017.
Niaz, Sara, Dalal, Ram C., Kopittke, Peter M., Wehr, J. B. and Menzies, Neal W. (2017). Soil sodicity – a threat to agricultural sustainability in semi-arid tropics. TropAg2017, Brisbane, Australia, 20-22 November 2017.
Wehr, J. Bernhard, Scholz, Lisa, Kopittke, Peter M. , Blamey, F. Pax C., Zhou, Ya-Feng, Macfarlane, David C. , Dalzell, Scott A. and Menzies, Neal W. (2014). Environmental fate of fluoride applied to soil and plants. World Congress of Soil Science, Jeju, Korea, 8-13 June 2014.
Smith, Tim E., Lewis, Tom, Menzies, Neal W., Dalal, Ram C., Wehr, J. Bernhard, Swift, Scott A., Tindale, Neil, Bryant, Philippa, Verstraten, Luke, McDonald, Janet M., McKenna, Brigid A. and Simpson, John A. (2014). Soil carbon change under exotic pine forests in the sub-tropics remeasured after 14 years - an excerpt from the reforestation in tropical and sub-tropical Australia project. Soil Science 2014: National Soil Science Conference, Melbourne, VIC, Australia, 23 - 27 November 2014. Warragul, VIC, Australia: Australian Society of Soil Science Incorporated.
Wehr, Johannes B., Kopittke, Peter M., Scholz, Lisa and Menzies, Neal W. (2013). Managing environmental risk of fluoride in coal seam water irrigation systems. Unavailable, Unavailable, Unavailable.
Blamey, F. Pax C., Kopittke, Peter M., Wehr, J. Bernhard, Wang, Peng, McKenna, Brigid A. and Menzies, Neal W. (2013). Using cations to probe the question: how do roots perceive, respond to, and sometimes modify their environment?. Proceedings of the XVII International Plant Nutrition Colloquium, Istanbul, Turkey, 19-22 August 2013.
Wehr, J. Bernhard, Smith, Tim, Blamey, Pax and Menzies, Neal (2010). Aluminum sensitivity and optimum Ca and pH requirement of teak (Tectona grandis Linn. f.) clones used for forestry plantations in Australia. 19th World Congress of Soil Science, Brisbane, Qld, Australia, 1-6 August, 2010. Australia: International Union of Soil Science.
Kopittke, Peter M., Blamey, F. Pax C., Wehr, J. Bernhard and Menzies, Neal W. (2010). Magnitude and kinetics of metal rhizotoxicity in cowpea. 19th World Congress of Soil Science, Brisbane, QLD, Australia, 1-6 August 2010. Brisbane, QLD, Australia: International Union of Soil Sciences.
McKenna, Brigid A., Wehr, J. Bernhard, Kopittke, Peter M., Blamey, F. Pax C. and Menzies, Neal W. (2010). Novel methods to investigate metal interactions with plant cell walls. 19th World Congress of Soil Science, Brisbane, QLD, Australia, 1-6 August 2010. Brisbane, QLD, Australia: International Union of Soil Sciences.
Wehr, J.B., Blamey, F.P.C., Kerven, G.L., Horst, W.J., Hanna, J.V. and Menzies, N.W. (2009). Aluminum bound to plant cell walls - Does staining give clues about the bound Al species?. Plant-Soil Interactions at Low pH: A Nutriomic Approach, Guangzhou, China, 17-21 May 2009. Guangzhou, China: South China University of Technology Press.
Kopittke, P.M., Blamey, F.P.C., Wehr, J.B. and Menzies, N.W. (2009). Similarities and differences in the recovery of cowpea roots from toxicities of aluminum, copper and lanthanum. Plant-Soil Interactions at Low pH: A Nutriomic Approach, Guangzhou, China, 17-21 May 2009. China: South China University of Technology Press.
Wehr, J. B., Blamey, F. P. C., Kerven, G. L., Horst, W. J., Hanna, J. V. and Menzies, N. W. NW (2008). Determination of charge density of colloids by dye binding and can it be applied to plant cell walls?. Joint Conference of the Australia and New Zealand Societies of Soil Science, Palmerston North, New Zealand, 1-5 December 2008. Palmerston North, New Zealand: Massey University.
McKenna, B. A., Wehr, J. B. and Menzies, N. W. (2008). Using Gluconacetobacter xylinus as a tool to investigate aluminium interactions with plant cell walls. Joint Conference of the Australia and New Zealand Societies of Soil Science: ‘SOIL – the living skin of Planet Earth’, Palmerston North, New Zealand, 1-5 December 2008. Palmerston North, New Zealand: Massey University.
Wehr, Bernhard, Blamey, Pax, Kerven, Graham, Horst, Walter, Hanna, John and Menzies, Neal (2006). Chemical speciation of aluminium bound to pectin as model for aluminium binding in the plant cell wall. ASSSI-ASPAC-ACMS National Soils Conference, Adelaide, South Australia, Australia, 3-7 December 2006.
Seminar Paper
Kopittke, Peter M., Brigid McKenna, Wehr, Johannes B., Menzies, Neal W., Dalzell, Scott A. and Macfarlane, David (2013). Evaluation of the effectiveness of land amendment irrigation on a range of GLNG soils. Santos GLNG Technical Review Committee. School of Agriculture and Food Sciences.
Reference Entry
Wehr, J. B., Blamey, F. P. C. and Menzies, Neal (2007). Aluminum.
Thesis
Wehr, Johannes Bernhard (1998). Reactions of cations with pectin and root cell walls. PhD Thesis, School of Land, Crop and Food Sciences, The University of Queensland. doi: 10.14264/365874
Research Reports
Wehr, Bernhard and Kopittke, Peter (2020). Re-interpretation of soil core data with regard to changes in pH, EC and sodicity during irrigation with coal seam water. St Lucia, QLD, Australia: The University of Queensland.
Wehr, Bernhard, Kirchhof, Gunnar and Menzies, Neal (2020). Sustaining soil fertility in support of intensification of Sweetpotato cropping systems. Canberra, ACT, Australia: ACIAR.
Wehr, Bernhard, Kirchhoff, Gunnar and Menzies, Neal (2019). Sustaining soil fertility in support of intensification of Sweetpotato cropping systems. Canberra, ACT, Australia: ACIAR.
Wehr, J. Bernhard and Kopittke, Peter (2019). Review of sulfur oxidation in soil with particular reference to land amendment irrigation for the management of coal seam water. St Lucia, QLD, Australia: The University of Queensland.
Wehr, Bernhard (2018). Effect of NatraMin on soil physical, chemical and biological properties. Innovation Connections Brisbane, Australia: University of Queensland.
Wehr, Bernhard (2017). Effect of palagonite on soil properties and plant growth. Innovation Connections Brisbane, Australia: University of Queensland.
Wehr, Bernhard (2017). Investigation into vegetation die-off at the black-breasted button quail habitat at QAL Gladstone. Brisbane, Australia: University of Queensland.
Wehr, J.B., Kopittke, P.M. and Menzies, N.W. (2016). Land amendment irrigation Phase III. Final Report. Santos-UQ Large core project.. Brisbane, Australia:
Wehr, Johannes B., Kopittke, Peter M., Cicchelli, Federico, Zubir, Nur Faeizah, Steenhauer, Mike and Menzies, Neal W. (2016). The impact of overhead irrigation with saline-sodic and alkaline water on plant health and productivity. St Lucia, QLD, Australia: School of Agriculture and Food Sciences, The University of Queensland.
Wehr, Johannes B., Kopittke, Peter M. and Menzies, Neal W. (2015). Santos - UQ Large core project - Land amendment irrigation Phase III. Progress report 4. Brisbane, Australia:
Wehr, J. Bernhard, Kopittke, Peter M., Scholz, Lisa and Menzies, Neal W. (2015). The environmental fate of fluoride in coal seam water irrigation systems. Final Report. St Lucia, QLD, Australia: School of Agriculture and Food Sciences, The University of Queensland.
Wehr, Bernhard, Kopittke, Peter M. and Menzies, Neal W. (2015). Santos - UQ Large core project - Land amendment irrigation - Progress report 3. Brisbane, Australia: School of Agriculture and Food Sciences, The University of Queensland.
Wehr, Bernhard , Kopittke, Peter and Menzies, Neal (2015). Assessing adsorption of fluoride from soil properties. Milestone Report 2. St Lucia, QLD, Australia: School of Agriculture and Food Sciences, The University of Queensland.
Smith, Tim and Wehr, Bernhard (2015). Review of macadamia orchard nutrition. MC15012 Sydney, Australia: Horticulture Innovation Australia.
Wehr, J. Bernhard, Kopittke, Peter M., Scholz, Lisa and Menzies, Neal W. (2014). Understanding the movement of fluoride from soils into the broader ecosystem - Final Report. Uniquest Project No: 00767 St Lucia, QLD Australia: The University of Queensland, School of Agriculture and Food Sciences.
Wehr, Johannes B., Kopittke, Peter M., Scholz, Lisa and Menzies, Neal W. (2014). Understanding the movement of fluoride from soils into the broader ecosystem. Santos Ltd.. Brisbane, Australia:
Wehr, Johannes B., Kopittke, Peter M. and Menzies, Neal W. (2014). Final Report - UQ Land conditioning intact soil core study. St Lucia, QLD, Australia: The University of Queensland, School of Agriculture and Food Sciences.
Wehr, Bernhard, Kopittke, Peter and Menzies, Neal (2014). Milestone report 7: UQ land conditioning intact soil core study. Not available:
Wehr, Bernhard and Kopittke, Peter (2013). Milestone report 6: UQ land conditioning intact soil core study. Not available:
Wehr, Bernhard and Kopittke, Peter M. (2013). Solid phase sampling of large intact cores: UQ land conditioning intact soil core study. Not available:
Wehr, Bernhard and Kopittke, Peter M. (2013). Milestone Report 5 - UQ Land conditioning intact soil core study. St Lucia, QLD, Australia: The University of Queensland, School of Agriculture and Food Sciences.
Wehr, Johannes B. and Kopittke, Peter M. (2013). Understanding movement of F from soils into the broader ecosystem: Progress Report 3. St Lucia, QLD Australia: The University of Queensland School of Agriculture and Food Sciences.
Wehr, Bernhard, Kopittke, Peter and Menzies, Neal (2013). Risk associated with irrigating pastures with F-containing coal seam water: UQ report to Santos. St Lucia, QLD Australia: The University of Queensland School of Agriculture and Food Sciences.
Wehr, Bernhard (2013). Annual Report Land conditioning intact soil core study. St Lucia, QLD Australia:
Wehr, Bernhard and Kopittke, Peter (2013). Milestone report 4: UQ land conditioning intact soil core study. Not available:
Wehr, Bernhard and Kopittke, Peter (2013). Understanding the movement of F from soils into the broader ecosystem: Preliminary Report 2. St Lucia, QLD Australia: The University of Queensland School of Agriculture and Food Sciences.
Wehr, Bernhard and Kopittke, Peter (2013). Milestone report 3: UQ land conditioning intact soil core study. Not available:
Wehr, Bernhard and Scholz, Lisa (2013). Understanding movement of F from soils into the broader ecosystem: interim report 2. Not available:
Wehr, Johannes B., Scholz, Lisa and Kopittke, Peter M. (2013). Understanding movement of F from soils into the broader ecosystem: interim report 3. St Lucia, QLD Australia: The University of Queensland School of Agriculture and Food Sciences.
Wehr, Johannes B. (2012). Desorption of F from soil - Interim Report. St Lucia, QLD, Australia: University of Queensland.
Kopittke, Peter M., Blamey, Pax, Wehr, Johannes B. and Menzies, Neal W. (2012). Retention of foliar-applied fluoride in forage plants. Santos Ltd.. Brisbane, Australia:
Wehr, Bernhard, Kopittke, Peter and Menzies, Neal (2012). Adsorption of CSG-fluoride by soils in repacked columns - Final Report. Research Project Brisbane, QLD Australia: The University of Queensand, School of Agriculture and Food Sciences.
Wehr, Bernhard (2012). Interim report on fluoride adsorption trials. Not available:
Wehr, Johannes B. (2011). Final Report to Elders Forestry on the limestone-Ca-chloride trials at Ripple Creek. St Lucia, QLD, Australia: The University of Queensland, School of Agriculture and Food Sciences.
Wehr, Bernhard, Menzies, Neal and Smith, Tim (2010). Elders Forestry - UQ - DEEDI Research project on teak mineral nutrition: Final Report 2010. Australia: Australian Government, Department of Employment, Economic Development and Innovation (DEEDI).
Wehr, Bernhard and Smith, Tim E (2010). Annual Report 2009. Elders Forestry - UQ - DPI Research project on teak mineral nutrition. St Lucia, QLD Australia: The University of Queensland.
Wehr, J. Bernhard (2010). Screening of teak genotypes for acid soil tolerance: Outcome report to Elders Forestry. Joint ITC – UQ – DPIF research project St Lucia QLD, Australia: The University of Queensland School or Land, Crop and Food Sciences.
Wehr, Bernhard (2009). Interim report to ITC Ltd on the teak mineral nutrition trial at Ripple Creek. St. Lucia, QLD, Australia: The University of Queensland.
Wehr, Bernhard and Smith, Tim E. (2008). Annual report 2008 and milestone reports: ITC teak mineral nutrition project. St. Lucia, QLD, Australia: School of Agriculture and Food Sciences, The University of Queensland.
Wehr, Bernhard (2008). Liming requirement of some prospective teak plantation soils in northern Queensland: final recommendation to ITC Ltd. St. Lucia, QLD, Australia: The University of Queensland.