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Department of Soil Science Conference Proceedings

?????International Confer??ence Pr??esentations

2015

  • Hardie, A.G., van der Ham, I. and Rozanov, A. (2015). The effect of inorganic fertilizer application on compost and crop litter decomposition in sandy soil. 5th International Symposium on Soil Organic Matter, G?ttingen, Germany, September 20-24, 2015.
  • Labuschagne, J., Cooper, G, Hardie, A.G. and Strauss, J. (2015). Long-term effect of tillage and crop rotation practices on soil organic C in the Swartland, Western Cape, South Africa. 5th International Symposium on Soil Organic Matter, G?ttingen, Germany, September 20-24, 2015.
  • Rozanov, A, Hardie, A.G., Olivier, C. and Sigge, G. (2015). In vitro aerobic and anerobic degradation of biochar. 5th International Symposium on Soil Organic Matter, G?ttingen, Germany, September 20-24, 2015.
  • Rozanov, A., Ros, I, and Wiese, L. (2015). On soil organic matter and van Bemmellen Factor. 5th International Symposium on Soil Organic Matter, G?ttingen, Germany, September 20-24, 2015.
  • Smith, J.D.V., Strauss, J and Hardie, A.G. (2015). Long-term effect of integrated no-till crop and pasture-based livestock systems on soil organic matter fractions and soil quality (W. Cape, South Africa). 5th International Symposium on Soil Organic Matter, G?ttingen, Germany, September 20-24, 2015.

2014

  • ??Andreoli, M., Clarke, C., Evans, M., Harris, C.,  Logue, A., Majodina, T., McCarthy, T., Netterberg, F., Strengel, I., van Blerk, J. and van Rooyen, L. (2014) Clay Stratigraphy at the Vaalputs Low Level Radioactive Waste Disposal Site, Namaqualand, South Africa. 21st General Meeting of the International Mineralogical Association, Johannesburg, 31 August-5 September, 2014?
  • Dunford, A.J., Miller, J.A., Clarke, C.E., Swana, K.A. and Durr, L., (2014). Impacts of large scale groundwater abstraction from the TMG aquifer on the bottled water industry: An example from the Hartebeeskraal farm, Paarl. 41st International association of hydrolygists, International Congress, Marrakech, Morocco, September 15-19,  2014
  • Smuts, I., Clarke, C.E. and Hardie, A.G. (2014). Mineralogical and Chemical Characterization of Arid Granitic Soils after Prolonged Exposure to Acid Mine Drainage. 20th World Congress of Soil Science. Jeju, South Korea, June 8-13, 2014.?

20??1?2

  • Hardie, A.G., Mchunu, S. and Mills, A. (2012). Soil carbon distribution and stability in semi-arid, succulent-thicket ecosystem from South Africa. Eurosoil 2012 Conference, Bari, Italy. July 2-6, 2012.
  • Hardie, A.G., Rozanov, A., Sika, M., Zeelie, A, Olivier, C., Hoffman, E., Valentine, A., and Botha, A. (2012). Biochar amendment of sandy soil from Western Cape, South Africa: Effect on soil quality and fertilizer leaching. Eurosoil 2012 Conference, Bari, Italy. July 2-6, 2012.
  • Hoffman, J.E. (2012). Evaluating long term effects of deep soil preparation with selected soil physical properties. 19th ISTRO Congress, Montevideo, Urugauy, September 24-28, 2012.

??2?011

  • Bugan, R., Jovanovic, N., Fink, M., Kralisch, S., De Clercq, W., Fluegel, W-A. and Helmschrot, J. (2011). Dryland Salinity Managment in the Semi-Arid Western Cape (South Africa). IUGG Conference (Earth on the Edge: Science for a Sustainable Planet), Melbourne, Australia, 28 June - 7 July 2011.
  • Jovanovic, N., Israel, S., Petersen, C., Bugan, R.D.H., Tredoux, G., De Clercq, W.P., Rose, R., Conrad, J. And Demlie, M. (2011). Guidelines for Integrated Catchment Monitoring: ICM mind map development and demonstration. International Conference on Groundwater: Our Source of Security in an Uncertain Future, September 19-21, 2011, Pretoria, South Africa.
  • Kritzinger, D.J. and J.E. Hoffman. (2011). Evaluating long-term sustainability of deep soil preparation with selected soil physical parameters. XXXIV World Congress of Vine and Wine. “The wine construction”. June 20-27, 2011. Porto, Portugal.

2??0?10

  • Carrier, M., Hardie, A.G., Uras, U., Gorgens, J and Knoetze, J. (2010). Vacuum pyrolysis of sugar cane bagasse and its applications. Bioten Conference 2010, Birmingham, UK. September 21-23, 2010.
  • Hardie, A.G., Dynes, J.J., Kozak, L.M. and Huang, P.M. (2010). Abiotic catalysis of the Maillard and integrated catechol-Maillard humification pathways by Al, Fe and Mn oxides. 19th  World Congress of Soil Science 2010, Brisbane, Australia. August 1-6, 2010.
  • Jovanovic, N., Bugan, R.D.H., Maherry, A., De Clercq, W.P., Fey, M.V., Helmschrot, J. and Flugel, W.-A. (2010). Management of Human-induced Salinisation in the Berg River Catchment (South Africa). Workshop 6: Minimising Land Use Based Water Pollution, World Water Week, Stockholm International Water Institute, Stockholm, Sweden. September 5-11, 2010.
  • Jovanovic, N.Z., Bugan, R.D.H., Petersen, C., De Clercq, W.P., Rozanov, A. and Botha, H. (2010). Generation and size distribution of sediment eroded in a small-scale catchment of the Western Cape (South Africa). Water Pollution, Hungary. In: A.M. Marinov, C.A. Brebbia (eds.) Water Pollution X, 195-206. ISBN 978-1-84564-448-2, Wit Press, Southampton, UK. 
  • Rozanov, A. and de Clercq, W.P. (2010). In-field visualisation of water infiltration and soluble salt transport. 19th  World Congress of Soil Science 2010, Brisbane, Australia. August 1-6, 2010.
  • Steudel, T., de Clercq, W.P., Bugan, R.D.H., Jovanovic, N., Hardy, M., Scheibler, F., Helmschrot, J. (2010).  Initial hydrological modelling to assess impacts of different land uses on process hydrology in a small-scale semi-arid catchment in the Western Cape Province, South Africa.  AdG Conference, Frankfurt, Germany.

2??009

  • Bugan R.D.H., Jovanovic N.Z., De Clercq W.P., Helmschrot. J., Flügel. W.A. and Leavesley G.H. (2009). A comparative analysis of the PRMS and J2000 hydrological models applied to the Sandspruit Catchment (Western Cape, South Africa). Second International Conference on Management of Natural Resources, Sustainable Development and Ecological Hazards. Proceedings published by WIT press, Wessex, United Kingdom, 2009: 391-402.
  • De Clercq, W.P., Jovanovic, N.Z. and Fey, M.V. (2009). An overview of the salinization problem in the Berg River catchment (South Africa). Second International Conference on Management of Natural Resources, Sustainable Development and Ecological Hazards. Proceedings published by WIT press, Wessex, United Kingdom, 2009: 379-389.
  • Hardie, A.G., Dynes, J.J., Kozak, L.M. and Huang, P.M. (2009). Abiotic catalysis of the Maillard and integrated catechol-Maillard humification pathways by soil clays. IUPAC Symposium on Molecular Environmental Soil Science (ISMESS), Hangzhou, China. October 10-14, 2009. 
  • Harper, J. Fey, M.V. Mbakwe, I. (2009). Potential of fly ash as source of alkalinity for amelioration of acid soils of the South African Highveld. International Stonemeal Conference, Brazilia, Brazil.  September 2009.
  • Hoffman, J.E., (2009). Evaluating the rainfall storage efficiency to optimize water harvesting for crop water production in arid climates. 18th Triennial Conference of the International Soil Tillage Research Organisation (ISTRO). Izmir, Turkey. June 15-19, 2009.?

20??08

  • de Clercq, W.P., Van Meirvenne, M., Ellis, F. and Lambrechts, J.J.N. (2008). An adapted approach in using EM38 soil scans for mapping soil type for vineyards. Global Workshop on High Resolution Digital Soil Sensing & Mapping, Sydney, Australia. February 5-8, 2008.
  • Jovanovic, N.Z., Bugan, R.D.H., Frantz, G., de Clercq, W. and Fey, M. (2008). Hydrosalinity fluxes in a small scale catchment of the Berg River (South Africa). Ninth International Conference on Water Pollution: Modelling, monitoring and management. Spain. In: D. Prats Rico, C.A. Brebbia, Y. Villacampa Esteve (eds.) Water Pollution IX, 603-612. ISBN 978-1-84564-115-3, Wit Press, Southampton, UK.

2?00?7

  • de Clercq, W., Helmschrot, J., Fey, M.V., Flügel, W.A. and Krause, P. (2007). A scale integrated hydrological approach to redefine dryland salinity behaviour in South Africa. Annual Meeting of the Africa group of German Geoscientists (AdG), Potsdam, Germany. July 6-7, 2007.
  • Fey, M.V. (2007) Farming with chemistry: Trends and promises for Africa. Chemrawn XII. Stellenbosch, South Africa, p.100 (paper).
  • Harper, J., Fey, M. V., Eustice, T., Lategan, E. and Wessel, A. (2007). Powdered granite effects on acid soil and soil plant interaction involving base cations. International Rocks for Crops Conference, Nairobi, Kenya.?

2??00?6

  • Hoffman, J.E., (2006). Adapting agricultural practices in the western interior of South Africa to optimize water harvesting for crop production. 18th World Congress Of Soil Science. Philadelphia, PA, USA. July 9-15, 2006.?
  • Hoffman, J.E., (2006). Evaluating regulated deficit irrigation (RDI) practices for Citrus production in South Africa. 18th World Congress Of Soil Science. Philadelphia, PA, USA. July 9-15, 2006. 
  • Kunneke A. and WP de Clercq, W.P. (2006). Advanced techniques of measuring and mapping the impact of harvesting operations on forest soils. International Precision Forestry Conference. Stellenbosch, South Africa.?

2??0?04

  • Du Plessis, H.M., Annandale, J.G., de Clercq, W.P., and Fey, M.V. (2004). The Use of Poor Quality Water for Irrigation – the South African Experience. Published proceedings of the International Commission on Irrigation and Drainage (ICID), Moscow, Russia. September 2004.
  • Fey, M.V. and de Clercq ,W.P. (2004). More effects of wheat farming on water quality in a salty landscape: the Berg River basin in South Africa. Eurosoil 2004, Freiburg, Germany. p. 134 (abstract).
  • Francis, M., Fey, M. V. and Ellis, F. (2004). Sepiolite formation in soils of the Namaqualand coastal plain, South Africa. 82nd Annual Meeting of Deutschen Mineralogischen Gessellschaft (DMG) and Deutschen Ton- und Tonmineralgruppe (DTTG) (German Mineralogical Society / Clays and Clay Mineral Group), Karlsruhe, Germany. Berichte der Deutschen Mineralogischen Gessellschaft (Supplement to the European Journal of Mineralogy, Vol 16, 2004).
  • Hardie, A.G., Fey, M.V., and Breuer, J. (2004). Decontaminating soil by activation with acids and bases. Eurosoil 2004, Freiburg, Germany. p.89 (abstract).
  • Mills, A.J. and Fey, M.V. (2004).  Tendency to crust as an indicator of soil quality in South Africa. Eurosoil 2004, Freiburg, Germany. p.224 (abstract).?

2???0?03

  • Breuer, J., Hardie, A.G., Fey, M.V., Herrmann, L. and Kuzyakov, Y. (2003). Ver?nderung der Mobilit?t von Bodenkontaminanten durch chemische Aktivierung mit S?uren und Basen. Tagung der Deutschen Bodenkundlichen Gesellschaft, September 2003, Frankfurt, Germany. Mitteilungen der Deutschen Bodenkundlichen Gesellschaft 102: 163-164. de
  • Clercq, W.P. and van Merivenne, M. (2003). Effect of long-term irrigation application on the variation of soil electrical conductivity in vineyards. Pedometric Conference 2003. Reading, U.K.
  • Mills, A.J., O’ Conner, T.G., Skowno, A., Bosenberg, D.W., Donaldson, J. Lechmere-Oertel, R., Fey, M.V. and Sigwela, A. (2003). Farming for carbon credits: implications for land use decisions in South African rangelands. International Rangelands Congress 2003. Durban, South Africa.?

Local Confe??rence Pres?entations

2016

  • Cooper, G.D., Hardie, A.G., Strauss, J.A. and Labuschagne, J. (2016). Long-term effect of tillage and crop rotation practices on soil C and N stocks in the Swartland, Western Cape, South Africa. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2016. Bloemfontein, South Africa. January 20-23, 2016.

2015

  • Carstens, M.E., de Clercq, W.P., Lambrechts, J.J.N., Ellis, F and Clarke, C.E. (2015). Spatial distribution and chemical properties of bleached topsoils occuring on red and yellow-Brown apedal subsoils. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 39).
  • Clarke, C.E. and Aquillar-Carillo, J. (2015). Quantification of drying induced acidity at the mineral-water interface. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 44).
  • ??Cooper, G.D., Hardie, A.G., Strauss, J.A. and Labuschagne, J. (2015). Long-term effect of tillage and crop rotation practices on soil organic C in the Swartland, Western Cape, South Africa. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015. (p. 203).
  • De Clercq, W.P. (2015). Are we really the first to apply minimum tillage? Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 48).
  • Le Roux, J.L., Lambrechts, J.J.N, Ellis, F., de Clercq, W.P. and Clarke, C.E. (2015). Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 90)?.?
  • Leygonie, I.R., Labuschagne, J., Hoffman, J.E., and van Zyl, H. (2015). The effect of once-off tillage on the soil water content and resultant crop response of a shale-dervied soil under no-til in the Swartland sub-region of the Western Cape.  Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2012. George, South Africa. January 19-22, 2015.? (p. 229).
  • Rozanov, A., Ros, I., and Wiese, L. (2015). Soil organic matter constant, variable and unknown. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 149).
  • Sika, M.P., Rozanov, A. and Hardie, A.G. (2015) Effect of biochars with varying physiochemical properties on C and N mineralization of sandy soil. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015. (p. 159).?
  • Van der Ham, I., Rozanov, A. and Hardie, A.G. (2015). The effect of inorganic fertilizer application on compost decomposition dynamics in sandy soil. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015. (p. 176).
  • Wiese, L., Ros, I., Rozanov, A., de Clerq, W.P. and Seifert, T. (2015). Soil carbon accounting in KZN Midlands using vertical distribution functions. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2015. George, South Africa. January 19-22, 2015.? (p. 190).

2014

  • Carstens, M.E., Clarke, C.E., Ellis, F., Lambrechts, J.J.N. and le Roux, J.L., (2014). Controls on the spatial distribution of bleached topsoils occuring on red and yellow-brown apedal subsoils, 2nd NRF/DST National Global Change Conference, Port Elizabeth, December 1-5, 2014?.
  • ?Mathys, I.L., Clarke, C.E., and Hardie, A.G. (2014). Evaluation of field and laboratory amorphous Al diagnostic tests for humic topsoils. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2014. Grahamstown, South Africa. January 20-23. 2014?.?
  • Sika, M.P., Rozanov, A., Carrier, M. and Hardie, A.G. (2014). Adsorption of ammonium and nitrate by biochars with contrasting physicochemial properties. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2014. Grahamstown, South Africa. January 20-23. 2014.?
  • Smith, J.D.V., Strauss, J. Hardie, A.G. (2014). The effect of long term conservation tillage crop rotation practices on soil organic matter functional pools (W.Cape, RSA). Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2014. Grahamstown, South Africa. January 20-23. 2014.?? 
  • Smith, J.F.N., Botha, A. and Hardie, A.G. and  (2014).  Effect of compost and foliar sprays on rooibos tea growth and yields. Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2014. Grahamstown, South Africa. January 20-23. 2014.

2013

  • Smith, J.D.V., Hardie, A.G. and Strauss, J. (2013). The effect of long term conservation tillage crop rotation practices on soil organic carbon (W.Cape, RSA). Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2013. Durban, South Africa. January 21-24. 2013.
  • Smith, J.F.N., Hardie, A.G. and Botha, A. (2013).  Investigation of soil quality (health) in commercial production of Rooibos tea (Aspalathus linearis) in the Western Cape, South Africa . Combined Congress of Soil Science Society of South Africa (SSSSA), HSSSA, SAWSS and SASCP 2013. Durban, South Africa. January 21-24. 2013.?

2?012

  • Botha, P.B., de Clercq, W.P., Hoffman, J.E. and Agenbag, G.A. (2012). Tillage practices in crop production and the impact on basic soil properties. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • De Clercq, W.P., du Toit, T., Rozanov, A., Jovanovic, N., and Bugan, R.D.H. (2012). The Berg River Basin dryland salinity and landuse. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Ellis, F. and Lambrechts, J.J.N. (2012). Some potential field methods to assist with the correct idientification of soil material and diagnostic horizons in future soil classification procedures. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Jovanovic, N., Bugan, R.D.H., de Clercq, W.P., and Fey, M.V. (2012). Human-induced salinization in the Berg River Catchement: mechanisms and processes. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Jovanovic, N., Bugan, R.D.H., Musvoto, C., de Clercq, W.P., Rozanov, A. and van Breda, J. (2012). The EAU4FOOD Project: Innovation process and problem diagnostics. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.?
  • Koetlisi, K.A., Hoffman, J.E. and Pienaar, A.J. (2012). Influence of soil texture, water management and nitrogen fertilizer on biomass production and antimicrobial properties of Mentha longifolia L. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Mashimbye, Z.E., de Clercq, W.P. and Van Niekerk, A. (2012). Digital terrain mapping of the Sandspruit Catchment in the Western Cape Province of South Africa. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Mathys, I.L. and Rozanov, A. (2012). Soil health (quality) assessment of topsoil conditions in a long-term vineyard surface management trial in Robertson, South Africa. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Mchunu, S.E., Hardie, A.G. and Mills, A.J. (2012). Soil Carbon distribution and stability in intact and degraded Spekboom Thicket soils. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Olivier, C.F., Rozanov, A., Botha, A. and Hardie, A.G. (2012). Aerobic degradation of biochar in vitro. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Olivier, C.F., Rozanov, A., Sigge, G., Botha, A. and Hardie, A.G. (2012). In vitro anaerobic digestion of biochar by a methanogenic consortium. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012. 
  • Olivier, C.F., Rozanov, A., Botha, A. and Hardie, A.G. (2012). Chemical degradation of biochar. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Sika, M.P. and Hardie, A.G. (2012). Effect of biochar on soil chemistry, wheat growth and n fertilizer leaching of sandy soil (W. Cape, RSA). Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Stander, M.D.T., Rozanov, A., Jovanovic, N. and Ellis, F. (2012). Preferential flow assessment in soil on fractured bedrock and cover sand aquifers. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Stander, M.D.T., Rozanov, A., Jovanovic, N. and Ellis, F. (2012). Groundwater recharge estimation using soil pattern analysis. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.
  • Zeelie, A., Hoffman, J.E. and Hardie, A.G. (2012). Effect of biochar on selected soil physical properties of a low potential sandy soil. Combined Congress of Soil Science Society of South Africa (SSSSA), SAWSS and SASCP 2012. Potchefstroom, South Africa. January 16-19. 2012.

2011?

  • De Clercq, W.P., Ellis, F., Hoffman, J.E. and Jovanovic, N. (2011). Renosterveld: a tool to manage dryland salinity in the western cape. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2011. Pretoria, South Africa. January 17-21. 2011.
  • De Clercq, W.P. (2011). Soil health and the long term management of this resource. Conservation Agriculture, CAPE Partners Conference, Elsenburg, 23 June 2011.
  • Van Rensburg L.D., De Clercq W.P. Barnard J.H. and Du Preez C.C. (2011). Salinity guidelines for irrigation: case studies from Water Research Commision projects along the lower Vaal, Riet, Berg and Breede Rivers. WRC 40 Conference, Johannesburg, South Africa.
  • Mashimbye, Z.E., de Clercq, W.P. and van Niekerk, A. (2011).  Hyperspectral characterization of salt-affected soils in the Sandspruit catchment. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2011. Pretoria, South Africa. January 17-21. 2011. 
  • Stander, M.D.T., Rozanov, A., Ellis, F. and Jovanovic, N. (2011).  An investigation to reduce uncertainties about the influence of soil pattern on ground water recharge. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2011. Pretoria, South Africa. January 17-21. 2011.

201?0

  • Hardie, A.G., de Lange, L. and Hoffman, J.E. 2010. Characterization of raw and chemically oxidised biochar for use as a soil amendment. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2010. Bloemfontein, South Africa. January 15-19, 2010.
  • Vermeulen, T., de Clercq, W.P., Ellis, F., Hoffman, J.E. and Jovanovic, N. (2010). The occurrence of Eletropapis Rhinosoretis.  Arid Zone Ecology Forum Conference 2010. Gariep Dam, South Africa. October 4-7, 2010.

2008

  • Eustice, T., Hoffman, J.E. and Fey, M.V. (2008). A study of water use efficiency of table Grapes in the Hex River valley. Combined Congress of Soil Science Society of South Africa (SSS?SA), SASHS, SAWSS and SASCP 2008. Grahamstown, South Africa. January 21 – 24, 2008.

20?07

  • Fey, M.V. (2007). Soil science-based improvements in subsistence agriculture. Proceedings of the Forum on Science-Based Improvements of Rural/Subsistence Agriculture, Committee on Science for Poverty Alleviation, ASSAf. Pretoria. pp 57-65.
  • Hoffman, J.E., (2007). Evaluating regulated deficit irrigation (RDI) practices for citrus production in South Africa. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2007. Badplaas, South Africa. January 22-25, 2007.

200?6

  • de Clercq, W.P. and Van Meirvenne, M. (2006). Predicting the change in soil electrical conductivity related to irrigation. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2006. Durban, South Africa. January 23-26, 2006.

20?05

  • Hoffman, J.E., (2005). Adapting agricultural practices in the western interior of South Africa to optimize water harvesting for crop production. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2005. Potchefstroom, South Africa. January 10-13, 2005.
  • Hoffman, J.E. and Jonker, A. (2005). The effect of temperature on the accuracy of capacitance probes in soil water monitoring. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2005. Potchefstroom, South Africa. January 10-13, 2005. 
  • Roux, F.A., Hoffman, J.E. and Ellis, F. (2005). The influence of specific soil and climate parameters on wine quality, character and vine performance. Combined Congress of Soil Science Society of South Africa (SSSSA), SASHS, SAWSS and SASCP 2005. Potchefstroom, South Africa. January 10-13, 2005.?

20?04

  • Ellis, F. (2004). Soil variation on and between heuweltjies in arid and semi-arid regions of South Africa. Arid Zone Ecology Forum Conference 2004. Victoria West, Northern Cape, South Africa.
  • Hoffman J. E. (2004). Besproeiingsopsies onder beperkte watervoorraad. KPV tegniese simposium, Stellenbosch, South Africa. September 14, 2004.
  • Prinsloo, H., Fey, M.V., Ellis, F . and Hoffman, J E. (2004). Effects of soil impediments on the growth patterns of the Strandveld Succulent Karoo in Namaqualand. Arid Zone Ecology Forum Conference 2004. Victoria West, Northern Cape, South Africa.
  • Snyman, K. and Ellis, F. (2004). Forest soils database (FSD) and interpretation of soil survey data. Preparing for Precision Forestry Symposium presented by Stellenbosch 中国体育彩票 (in collaboration with ICFR) ICFR/UNP. Pietermaritzburg, South Africa. June 22-23, 2004.

2003?

  • Agenbach G., Saayman D. and Fey M.V. (2003). Potassium supply and canopy management effects on quality of red wine from granite-derived soils near Paardeberg. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Burgers, C. and Fey, M.V. (2003). Precipitates of Al and Fe from fly ash and coal mine drainage: analogues of soil sesquioxides with implications for environmental sanitation. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • de Clercq, W.P. (2003).  Seasonal soil salinity/sodicity dynamics in a vineyard that was subjected to saline irrigation. water . Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Dowding C.E., Fey, M.V. and Ellis, F. (2003). The stability of manganese oxides in acid soils. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Engelbrecht, H.N. and de Clercq, W.P. (2003). A soil irrigation suitability study for the lower Berg River catchment. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Fey, M.V., Kotze, T.G. and Hoffman, J.E. (2003). Rapidly deteriorating quality of sandy soils under drip fertigation of citrus orchards of the Western Cape. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Fey, M.V., Manson, A., and Dowding, C.E. (2003). Soil chemistry in South Africa: a quarter century of progress, and prospects for the future. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Francis, M., Fey, M.V., and Ellis, F. (2003). Sepiolite-dominance of Aridisol clays in coastal Namaqualand. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Hoffman, J.E. (2003). Back to Basics. SABI besproeiingssimposium. Goudini, South Africa. May 6-8, 2003.
  • Mills, A.J. and Fey, M.V. (2003). Frequent fires intensify soil crusting: results from long-term experiments in South Africa. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.?
  • Mills, A.J. and Fey, M.V. (2003). Studies of declining soil quality in South Africa. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • O'Brien, R.D. and Fey M.V. (2003). Can local glauconite be used as K fertiliser? Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.
  • Prinsloo, H.P., Fey, M.V., Ellis, F. and Hoffman, J.E. (2003). Effects of soil impediments on the growth patterns of the Strandveld Succulent Karoo in Namaqualand. Golden Jubilee Congress of the Soil Science Society of South Africa. Stellenbosch, South Africa.