Resumen
- Weeds are known to grow around different types of crops, where they tend to compete with other plants and cause problems in agricultural production; therefore, a study on floristic composition and diversity of 12 farms was conducted. 4 of these farms had a conventional production purpose (Group 1), 4 more were transitioning to organic (Group 2), and the remaining 4 were oriented towards organic production (Group 3). Farms were located in the province of Sumapaz (Colombia) and distributed across three Life Zones, such as: Premontane Rainforest (PMRF), Low Montane Rainforest (LMRF) and Montane Rainforest (MRF). For specimen collection purposes, a restricted random sampling method was performed. Growers were surveyed to obtain more information on the use of the species identified. Diversity was calculated by using Margalef‟s index, Simpson‟s index and Shannon-Wiener‟s index, along with PAST 2.17, a statistical program. A total of 96 species were listed and distributed among 38 families. The most abundant species were Pennisetum clandestinum in (MRF), (LMRF) and Cynodon plectostachius in (PMRF). The greatest diversity of weeds was obtained in Groups 2 and 3. Different uses of weeds were identified mainly in the fields of animal nutrition and soil improvement through green fertilizers.