Search Results       Your search for [subject]Sludge -- Nitrogen fertilizer substitute returned 1 record.           Sludge as an alternative nitrogen fertilizer. by Damasco, Jossana A.; Quezon City: PSHS, 2002. Subject: Sludge -- Nitrogen fertilizer substitute; Nitrogen fertilizer substitute -- Sludge.          Add to Book Cart Relevance: 33.15%