Ishak, I. , L., L. , McHenry, M. , T., M. , Brown, B. , H., P.. "Soil Compaction in Tropical Organic Farming Systems and Its Impact on Natural Soil-Borne Disease Suppression: Challenges for Management". World Academy of Science, Engineering and Technology, Open Science Index 83, International Journal of Economics and Management Engineering, (2013), 7(11), 2926 - 2928.