Structure and Composition of Weed In Corn Fields (Zea mays L.) Village Belayu Marga District Tabanan Regency Bali Province

Corn (Zea mays L.) is one of the most important carbohydrate-producing food crops in world. One problems corn production a decrease quantity and quality due to presence weeds that grow around fields. This study aims determine structure composition fields Belayu Village, Marga District, Tabanan Regency, Bali Province. The method used this permanent quadrat with plot size 1x1 m. Data were analyzed using vegetation parameters consisting Important Value Index (IVI), diversity index (H'), dominance (C), evenness (E), similarity (IS). results obtained found 3rd week, namely 18 species from 9 families, at 6th 25 16 9th 31 19 families. highest IVI values ??were Cyperus rotundus L Cyperaceae families 3rd, 6th, weeks. Biodiversity (H') moderate ranges 2.29 2.77, (C) indicates no dominate ??ranging 0.09-0.13 (E) Weed types classified as evenly distributed 0.78-0.80, (IS) 72.9%, indicating weed each category was high.