Search Results       Your search for [subject]Nitrogen -- Effect on onion returned 1 record.           The use of rice straw mulch and nitrofen for weed control in transplanted onion. by Wongprom, Damrong; Nueva Ecija: Central Luzon State University, 1972. Subject: Agriculture; Onion -- Weed control; Onion -- Effect of rice straw mulch & nitrogen; Rice straw mulch -- Effect on onion; Nitrogen -- Effect on onion; Onion -- Culture.          Add to Book Cart Relevance: 34.87%