Keanekargaman Artropoda Tanaman Padi (Oryza sativa L.) Sistem Organik dan Konvensional di Trawas, Mojokerto, Jawa Timur: Diversity of Arthropods in Rice Plants (Oryza sativa L.) Organic and Conventional Systems in Trawas, Mojokerto, East Java (Agriculture Faculty - UPN)