Value-addition to agricultural products : towards increase of farmers' income and vitalization of rural economy: proceedings of the 9th JIRCAS International Symposium, Tsukuba, 16-17 october 2002 - Mori, Y.; Mori, Y.; Hayashi, Toru; Highley, E.; Highley, E. (JIRCAS International Symposium series ;, 2003)