Willekens, Koen; De Vliegher, Alex; Vandecasteele, Bart and Carlier, Lucien    (2008) Effect of Compost versus Animal Manure Fertilization on Crop Development, Yield and Nitrogen Residue in the Organic Cultivation of Potatoes.       Poster at:   Cultivating the Future Based on Science: 2nd Conference of the International Society of Organic Agriculture Research ISOFAR, Modena, Italy, June 18-20, 2008.