11 Nur Marahaini Mohd Nizar 2019-08-23 http://www.fao.org/tc/exact/sustainable-agriculture-platform-pilot-website/nutrients-and-soil-fertility-management/crop-rotation/en/ Food and Agriculture Organization (2019). Crop rotation. Retrieved from http://www.fao.org/tc/exact/sustainable-agriculture-platform-pilot-website/nutrients-and-soil-fertility-management/crop-rotation/en/ http://www.fao.org/3/a-i5310e.pdf Food and Agriculture Organization (2015). Traditional system makes more productive use of land. Retrieved from http://www.fao.org/3/a-i5310e.pdf