1. Agfact/Primefact Series (2013). www.dpi.nsw.gov.au/agriculture/horticulture/vegetables/commodity . Accessed 17 Jan 2013
2. Bartha L (1983) Yields of vegetable crops. Agnote, Department of Agriculture (Victoria). Order No. 2240/83, Agdex 207/01. ISSN 0155-0217, F.D. Atkinson, Government Printer, Melbourne, Australia
3. Bruinsma J (2009) The resource outlook to 2050: By how much do land, water, and crop yields need to increase by 2050? Expert meeting on how to feed the world in 2050, 24–26 June 2009. (Food and Agriculture Organisation of the United Nations, Rome)
4. Chan KY, Oates A, Swan AD, Hayes RC, Dear BS, Peoples MB (2006) Agronomic consequences of tractor wheel compaction on a clay soil. Soil Tillage Res 89:13–21
5. Chan KY, Dorahy CG, Tyler S, Wells AT, Milham PP, Barchia I (2007a) Phosphorus accumulation and other changes in soil properties as a consequence of vegetable production, Sydney region, Australia. Aust J Soil Res 45:139–146