A study was carried out during the 2005, 2006 and 2007 cropping seasons at the Research and teaching Farm of the Agronomy Department of the Faculty of Agriculture, Delta State University, Asaba Campus, Asaba Nigeria to evaluate the effects of populations (0, 10,000, 20,000 and 30,000 population/ha) and fertilizer levels (0, 200 and 400 kg/ha) on the yield of three low growing crops (groundnut, egusi-melon and sweet potato) with a view to recommending the crop(s) with the highest yield to farmers in the area. The experiment was a split-split factorial experiment fitted into a randomized complete block design and replicated four times. The results showed that the three low growing crop grown in NPK treated soils performed significantly (P?0.05) higher when compared with the control sub-plots without fertilizer treatment. The yield followed this trend sweet potato
