Show 20 5 10 15 20 50 100 250 Sort by year (new to old) Actions Download search results Subscribe to news feed Your filters: cql: keyword exact "mineral N balance method" Add to list Conference Paper P1 Evaluation of the current Belgian N fertilisation advice system for butterhead lettuce grown under glass Joost Salomez, Georges Hofman (UGent) , Marc Van Meirvenne (UGent) , Oswald Van Cleemput (UGent) , P Bleyaert and A Calus (1999) Acta Horticulturae. 506. p.93-98