du Preez, C., van Huyssteen, C. and Mnkeni, P. (2011) “Land use and soil organic matter in South Africa 2: A review on the influence of arable crop production”, South African Journal of Science, 107(5/6), p. 8 pages. Available at: https://sajs.co.za/article/view/10033 (Accessed: 2 May 2024).