Diversity Of Weeds Species Around Mango Tree (Mangifera indica L.) On Critical Land In Jombang Regency

Weeds are unwanted wild plants because they can interfere with the main crop cultivation. This study aims to identify and analyze diversity of weed vegetation that grows around mango trees. uses quadratic method diagonal observation points direct exploration techniques. Observation parameters include type its population. Then results observations were analyzed using formula Important Value Index (INP), Summed Dominance Ratio (SDR), Diversity (H'), Similarity (IS), (C). After doing research, found 24 species weeds consisting broadleaf weeds, puzzles grasses. The highest SDR value in Tondowulan Village was Cynodon dactylon L. at 13.82%, while Darurejo it Oplismenus hirtellus (L.) P. Beauv. by 26.53%. Weed classified as moderate index 1.92% 2.31%. two research locations did not have same composition similarity only 33.33%. There is no dominates garden dominance Villages order 3rd largest less than one.