CONYERS, Mark

CONYERS-mark-crop

Research interests

  • Acidic soils
  • Limestone, liming
  • Nitrogen fertility
  • Soil carbon
  • Soil phosphorous
  • Salinity of soil and water

Background

Mark Conyers is responsible for the Soil Science Laboratories at Wagga Wagga, where work in soil chemistry and physics is undertaken.

He joined NSW Agriculture* in 1985 and undertakes research in the mixed farming zone of southern NSW. His research initially focussed on acidic soils and has now branched into both traditional soil fertility (N, P, K) and into environmental issues (C, salinity).

*NSW Department of Primary Industries was formed on July 1, 2004 through an amalgamation of NSW Agriculture, NSW Fisheries, State Forests of NSW and the NSW Department of Mineral Resources.

Qualifications

  • B.Nat.Res.
  • M.Sc.Agr.
  • PhD

Current projects

  • Influence of subsoil constraints on canola yield (GRDC)
  • efficiency of fluid versus granular P fertilisers (GRDC)
  • carbon sequestration under pastures (CAG)
  • lime responses by pasture and sheep (AWI)
  • amelioration of subsoil acidity by plant uptake of calcium nitrate (ARC)
  • improving N uptake efficiency by NH4-N placement in an acidic soil layer (Graham Centre, NSW DPI & CSU)
  • N management under forage legumes (ACIAR)

Recent publications

Conyers MK (2006) Liming and lime materials. In “Encyclopedia of Soil Science” 2nd edition (Ed. R. Lal). Marcel Dekker, New York. pp 1034-1036.

Li GD, Helyar KR, Welham SJ, Conyers MK, Castleman LJC, Fisher RP, Evans CM, Cullis BR and Cregan PD (2006) pasture and sheep responses to lime application in a grazing experiment in a high-rainfall area, south-eastern Australia. I. Pasture production. Aust. J. Agric. Res., 57, 1045-1055.

Li GD, Helyar KR, Conyers MK, Castleman LJC, Fisher RP, Poile GJ, Lisle CJ, Cullis BR and Cregan PD (2006) pasture and sheep responses to lime application in a grazing experiment in a high-rainfall area, south-eastern Australia. II. Liveweight gain and wool production. Aust. J. Agric. Res., 57, 1057-1066.

Mullen CL, Scott BJ, Evans CM and Conyers MK (2006) Effect of soil acidity and liming on lucerne and following crops in central-western New South Wales. Aust. J. Exp. Agric., 46. 1291-1300.

Condon JR, Black AS and Conyers MK (2005) The influence of potassium and defoliation of ryegrass on the formation of acidic subsurface layers in stock urine patches. Aust. J. Soil Res., 43. 213-223.

Conyers MK, Helyar KR and Moroni JS (2005) The carbon cost of protecting the root apex from soil acidity: a theoretical framework. Plant & Soil 278. 195-204.

Professional associations and activities

  • Royal Australian Chemical Institute
  • Australian Society of Soil Science

Fields of research

  • 050304 Soil Chemistry (excl. Carbon Sequestration Science)
  • 070306 Crop and Pasture Nutrition

Australian and New Zealand Standard Research Classification (ANZSRC)

Keyword/phrase list of research interests

  • Aluminium
  • manganese
  • nitrogen
  • calcium
  • carbon
  • phosphorous
  • canola
  • water quality
  • limestone

Contact details

Email: mark.conyers@dpi.nsw.gov.au