The Phytosociology of Weeds in Agroforestry Systems in Different Types of Amazonian Forest Cover

Agroforestry systems are examples of soil exploration that is closer to the natural form forest, with intercropping several species within an area, thus being sustainable alternatives. Therefore, objective this work was evaluate weed community in agroforestry two ecosystems: solid ground and floodplain state Pará. Such collections were made eight areas, about one hectare each, cultivated systems, four which on dry land floodplains, rural area Cametá-PA. Four plots square meter per randomly sampled, where identified, counted, taken weigh community. Among evaluated environments, stood out most environment Kyllinga brevifolia, leading indices. In lowland ecosystem, Brachiaria purpuracens relevant.