References
- Angus JF, Peoples MB. 2013. Nitrogen from Australian dryland pastures. Crop and Pasture Science 63: 746–758. doi: 10.1071/CP12161
- Bertholdsson NO. 2005. Early vigor and allelopathy – two useful traits for enhanced barley and wheat competitiveness against weeds. Weed Research 45: 94–102. doi: 10.1111/j.1365-3180.2004.00442.x
- Bonanomi G, Antignani V, Barile E, Lanzotti V, Scala F. 2011. Decomposition of Medicago sativa residues affects phytotoxicity, fungal growth and soil-borne pathogen diseases. Journal of Plant Pathology 93: 57–69.
- FAO (Food and Agriculture Organization of the United Nations). 2010. The status of conservation agriculture in southern Africa: challenges and opportunities for expansion. REOSA Technical Brief 3. Johannesburg: FAO Regional Emergency Office for Southern Africa. Available at http://www.fao.org/ag/ca/doc/ FAO_REOSA_Technical_Brief3.pdf [accessed 28 March 2014].
- Ferreira MI, Reinhardt CF. 2010. Field assessment of crop residues for allelopathic effects on both crops and weeds. Agronomy Journal 102: 1593–1600. doi: 10.2134/agronj2010.0269
- Giller KE, Witter E, Corbeels M, Tittonell P. 2009. Conservation agriculture and smallholder farming in Africa: the heretics’ view. Field Crops Research 114: 23–34. doi: 10.1016/j.fcr.2009.06.017
- Hobbs PR, Sayre K, Gupta R. 2008. The role of conservation agriculture in sustainable agriculture. Philosophical Transactions of the Royal Society B: Biological Sciences 363: 543–555. doi: 10.1098/rstb.2007.2169
- Kassam A, Friedrich T, Derpsch R, Lahmar R, Mrabet R, Basch G, Gonzàlez-Sànchez EJ, Serraj R. 2012. Conservation agriculture in the dry Mediterranean climate. Field Crops Research 132: 7–17. doi: 10.1016/j.fcr.2012.02.023
- Le Roux AA. 2015. The effect of soil residue cover on medicago pasture establishment and production under conservation agricultural practices. MSc Agric thesis, Stellenbosch University, South Africa.
- Peachey RE. 1993. Cereal residue effects on weeds and cucumbers. MSc Agric thesis, Oregon State University, USA.
- Shelton DP, Jasa PJ. 2009. Estimating percent residue cover using the line-transect method. NebGuide G1931. Lincoln, NE: University of Nebraska-Lincoln Extension, Institute of Agriculture and Natural Recourses. Available at http://extensionpublications.unl.edu/assets/pdf/g1931.pdf [accessed 2 October 2014].
- Smith JDV. 2014. The effect of long-term no-till crop rotation practices on the soil organic matter functional pools. MSc Agric thesis, Stellenbosch University, South Africa.
- Strauss JA, Hardy MB, Langenhoven W. 2012. Gross margin analysis of crop and crop/pasture rotation systems that are being evaluated in the long-term crop rotation trail at the Tygerhoek Agricultural Research Farm - 2002 to 2010, vol. 1: Text. Unpublished report. Elsenburg: Department of Agriculture: Western Cape, Institute for Plant Production.
- Teasdale JR, Brandsaeter LO, Calegari A, Neto FS. 2007. Cover crops and weed management. In: Upadhyaya MK, Blackshaw RE (eds), Non-chemical weed management. Wallingford: CAB International. pp 49–64.
- Thiombiano L, Meshack M (eds). 2009. Scaling up conservation agriculture in Africa: strategy and approaches. Addis Ababa: FAO Subregional Office for Eastern Africa. Available at http://www.fao. org/ag/ca/doc/conservation.pdf [accessed 28 September 2014].
- van Heerden JM. 2013. Legume seed and seedling and weed seedling dynamics in annual medic pastures in wheat-medic systems in the Swartland region of the Western Cape. Grassroots 13(4): 41–54.
- Weston EJ, Dalal RC, Strong WM, Lehane KJ, Cooper JE, King AJ, Holmes CJ. 2002. Sustaining productivity of a Vertisol at Warra Queensland, with fertilisers, no-tillage or legumes. 6. Production and nitrogen benefits from annual medic in rotation with wheat. Animal Production Science 42: 961–969. doi: 10.1071/EA01083
- Wu H, Pratley J, Le Merle D, Haig T. 2006. Allelopathy in wheat (Triticum aestivum). Annals of Applied Biology 139: 1–9. doi: 10.1111/j.1744-7348.2001.tb00124.x