The survey of weed species in crops allows the identification, quantification of weed flora, its evolution in the area and helps in decision making for control of species. In this sense, the objective of this work was to survey weeds in pivot-irrigated rice fields in Cachoeira do Sul, Capané district, in the experimental area of the Rio Grandense do Arroz Institute (IRGA). Evaluations were performed by applying the 0.25 m2 square method, randomly launched sixty-eight times. Weeds in the sampled areas were removed from the soil, species identified and quantified. The evaluations were performed after the application of Gamit (preemerging), Ricer and Clincher and Imazethapyr (postemerging). Even after herbicide applications, 13 species were identified, representing the families Asteraceae, Poaceae, Malvaceae and Rubiaceae. Knowledge of the weeds present in the crop allows planning to improve control, avoiding unnecessary expense with herbicides or even using other methods to control these species.

The presence of weed species in soybean crops is a concern for farmers. Knowing these species is of great importance, as they cause serious damage to crops due to competition for nutrients, water, light and physical space with soy. This work aimed to survey weeds in pivot irrigated soybean crops in Cachoeira do Sul municipality, Capané district, in the experimental area of the Rio Grandense do Arroz Institute (IRGA). The evaluations were performed by applying the 0.25 m2 square method, launched at random sixty times. Weeds in the sampled areas were removed from the soil, species identified and quantified. Evaluations were performed after three applications of glyphosate herbicide. Even after glyphosate applications, seven species were identified, representing the families Asteraceae, Poaceae, Malvaceae, Euphorbiaceae and Rubiaceae. This survey enables the planning of preventive strategies for the sustainable control of weeds in the field, reducing production costs and the impact on the environment.

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The use of recyclable materials is an alternative for the preparation of school gardens and for the teaching of environmental education. In addition to being a facilitating tool for learning, the garden, when combined with the themes of environmental education, becomes fundamental for the formation of citizens aware that natural resources can be degraded or depleted. Thus, this study aimed to implement gardens with the use of recyclable material. The vegetable gardens were implemented in The Importance of Planning of Garden at School child education, elementary and high schools. The schools involved were Escola Municipal de Educação Infantil Sol Criança (Santiago-Rio Grande do Sul), Escola Estadual de Ensino Fundamental Bairro Carvalho (Cachoeira do Sul- Rio Grande do Sul), Colégio Estadual Cerro Branco (Cerro Branco- Rio Grande do Sul) e Colégio Totem (Cachoeira do Sul- Rio Grande do Sul). The recyclable materials used to prepare beds and support plants were pet bottles, tires, pallets and shingles. The activities were carried out by the members of the Living Garden Extension Project at School, together with the students and teachers of the schools. The garden space was used as an environment for teaching different subjects and allowed the development of playful and pleasurable activities.

Creating spaces to work on themes such as environment, sustainability and healthy eating is a practice adopted in early kindergarten schools. In this sense, the garden is a tool for working on various themes and developing students' commitment to the environment and to food production using sustainable techniques. Thus, this work aimed to plan and implement a vegetable garden at Escola Municipal de Educação Infantil Sol Criança (Santiago, Rio Grande do Sul) e no Colégio Totem (Cachoeira do Sul, Rio Grande do Sul). The planning of the garden was carried out with the help of teachers and pedagogical coordination of the schools involved, in order to provide greater interaction of students with the garden. For this, the beds were prepared with used tires, so that all the space was accessible to students. Members of the Horta Viva at School Extension Project prepare the flowerbeds and on the day of the vegetable planting the students and teachers of the schools participated in the activity. Activities were also planned to be developed with students during the school year. The garden has allowed for greater integration between students, and the space will serve for various teaching-learning activities in schools.