Yu, Chi Kang.2009-04-172009-04-1719601960Source: Dissertation Abstracts International, Volume: 68-06, Section: B, page: 3458.http://hdl.handle.net/10393/11016http://dx.doi.org/10.20381/ruor-8561Abstract not available. *This research was aided by a grant from the National Research Council of Canada (A-735).90 p.Agriculture, Agronomy.Thesis