Revista Brasileira de Engenharia de Biossistemas <table style="height: 190px;" width="800"> <tbody> <tr> <td width="141"> <h2 class="title"> </h2> <h2 class="title"> <img src="" /></h2> </td> <td width="425">The <em>Brazilian Journal of Biosystems Engineering</em> (BIOENG) publishes original articles that present theoretical, experimental, computational advances and innovations in the areas of agricultural and environmental systems, bringing applications for the sustainable development of agricultural and animal biosystem productions. BIOENG journal publishes interdisciplinary scientific articles and prioritizes issues related to Sustainable Development Goals (SDGs) of the United Nations (UN).</td> </tr> </tbody> </table> UNESP, Campus de Tupã en-US Revista Brasileira de Engenharia de Biossistemas 1981-7061 <p>Authors who publish in this journal agree to the following terms:</p> <p>a) Authors retain the copyright and grant the journal the right of first publication, with the work simultaneously licensed under the Creative Commons Attribution License that allows the sharing of the work with recognition of authorship and initial publication in this journal.</p> <p>b) Authors are authorized to assume additional contracts separately, for non-exclusive distribution of the version of the work published in this journal (eg, publish in an institutional repository or as a book chapter), with recognition of authorship and initial publication in this journal.</p> The economic importance of the peanuts production chain <h1>The importance and economic representativeness of the peanut production chain has grown exponentially in recent years, tending to gain more market share. Background: The study had as its theme the question: What is the economic, technological, social and environmental relevance of the peanut production chain for Brazil? Objective: Conduct a survey of information and data that allow inferring the economic, social and environmental importance of the peanut production chain for Brazil in the global scenario. Methods: The methodology applied was exploratory research "ad hoc" in exploratory theoretical essay of qualitative approach, and analytical descriptive in the report of the findings. Results: Exports grow on a logarithmic scale, in 2020 it had revenues of US$ 427.8 million. The sector generates 42 thousand jobs, and the culture makes it possible to meet social and environmental demands. Conclusions: The adoption of technologies and the improvement of production methods are essential for the continuous progress of the sector with the creation of jobs and the adhesion of new producers, with an increasingly sustainable production, with less environmental impact and reduction of fertilizer waste, with expansion of the productive capacity per planted bushel.</h1> Fabiano Pinto Neves Alisson Rodolfo Leite Leandro Paloma Mantovani Celso da Silva Luís Roberto Almeida Gabriel Filho Sandra Cristina De Oliveira Copyright (c) 2023 Revista Brasileira de Engenharia de Biossistemas 2023-05-11 2023-05-11 17 10.18011/bioeng.2023.v17.1186 Eucalyptus and Ipomoea nil phytotoxicity after herbicide application <h1>The presence of weeds in forest estates is considered one of the biggest problems in the implantation, maintenance, and renovation of eucalyptus plantations. This research aims to evaluate the phytotoxicity of herbicides on eucalyptus and I. nil. The experiment was installed inside a greenhouse in a completely randomized design with five replications. The treatments consisted of the application of 0.2% (v/v) adjuvant with the herbicides: atrazine (2250 g i.a. ha<sup>-1</sup>), clomazone (720 g i.a. ha<sup>-1</sup>), sulfentrazone (600 g i.a. ha<sup>-1</sup>), glyphosate (1440 g i.a. ha<sup>-1</sup>), and control. The following variables were analyzed: electron transport rate (ETR), water consumption, and plant phytotoxicity. For I. nil plants treated with atrazine, it was possible to detect phytotoxicity previous to the appearance of symptoms in the visual analysis, due to the inhibition of ETR at 24 hours after application (HAA). The highest levels of phytotoxicity for eucalyptus and <em>I. nil</em> were obtained by glyphosate and sulfentrazone, respectively.</h1> Ilca Puertas de Freitas e Silva Josué Ferreira Silva Junior Caio Antonio Carbonari Edivaldo Domingues Velini Rosilaine Araldi de Castro Leandro Tropaldi João Domingos Rodrigues Copyright (c) 2023 Revista Brasileira de Engenharia de Biossistemas 2023-02-16 2023-02-16 17 10.18011/bioeng.2023.v17.1069 Cotton nitrogen doses in the edaphoclimatical conditions of northeastern Brazil <h1>The study of cotton plant responses to nitrogen fertilization in different climate and soil conditions is essential for the correct management of nitrogen in this crop. Therefore, the objective of the present study was to evaluate the responses of cotton plants to nitrogen fertilization in the edaphoclimatic conditions of the Cariri region, located in the northeastern State of Ceará, Brazil. The experiment was conducted in an experimental area at the CENTEC (Centre for Technological Education) School of Technology (FATEC - Cariri campus), located in the city of Juazeiro do Norte, Ceará State. The statistical design adopted was Completely Randomized Design (CRD). The treatments were composed from the combination of four doses of nitrogen (0, 60, 120, and 180 kg ha<sup>-1</sup> of N, equivalent to 0, 50, 100, and 150% of the N recommendation for the crop) with four replications. Urea was used as a nitrogen source. At 42 days after sowing, the plants were collected. Plant height, number of leaves, stem diameter, leaf area, absolute growth rate, shoot and root dry matter, total and nitrogen use efficiency were evaluated. The different doses of nitrogen significantly influenced all the analysed variables. In general, nitrogen doses greater than 120 kg ha<sup>-1</sup> of N were shown to impair the growth and dry matter production of the cotton plant in the climate and soil conditions of the Cariri region, northeastern Brazil. In addition, excessive nitrogen fertilization was shown to reduce the efficiency of nitrogen use by the cotton crop.</h1> Célia Maria da Silva Aureliano de Albuquerque Ribeiro Evandro Fabio da Silva Mayana Garcias da Silva Suelem Vieira Alencar Sebastião Andrey Vicente Paulo Copyright (c) 2023 Revista Brasileira de Engenharia de Biossistemas 2023-05-11 2023-05-11 17 10.18011/bioeng.2023.v17.1194 Distance of brachiaria management in between the rows of coffee trees <h1>Brazil is the world's largest coffee producer, but with the changes in climate that have occurred in recent years, the concern with soil management with cover crops has become important, since it configures a strategy that can contribute to the improvement of production systems. Brachiaria is one of the main species used in intercropping in coffee production to generate biomass and soil cover. The objective of this research was to evaluate the effect of the distance of brachiaria management in between rows of coffee trees. The research was carried out from 2016 to 2022 in a coffee plantation implanted in 2016 with the cultivar Catuai Amarelo IAC 62 associated with <em>Brachiaria ruziziensis</em>, in a randomized block design, with 6 treatments and 4 replications: T1- without brachiaria between the rows (control), T2 - management of brachiaria up to the projection of the coffee tree crown, T3 - management with 25 cm distance from the projection of the crown of the coffee tree, T4 - management with 50 cm away from the projection of the coffee tree crown, T5 - management with 75 cm distance from the projection of the coffee tree crown, T6 - management with 100 cm distance from the projection of the coffee tree crown. The evaluated parameters were: setting and establishment of coffee seedlings, height of the orthotropic branches, length of the plagiotropic branches, number of internodes, and productivity. The intercropping of the coffee tree with brachiaria must be managed at 50 cm from the projection of the plagiotropic branch of the coffee tree, aiming at non-competition and better development of the crop.</h1> Kleso Silva Franco Junior Ademir Calegari Marcio de Souza Dias Giselle Prado Brigante Copyright (c) 2023 Revista Brasileira de Engenharia de Biossistemas 2023-02-27 2023-02-27 17 10.18011/bioeng.2023.v17.1184 Effect of glucose on germination performance in two soybean cultivars <h1>Glucose promotes increases in physiological processes related to plant growth and induces cell division and can also act in seed germination. The present investigation has been carried out on the influence of various concentrations of glucose on the germination performance of soybeans seeds of cv. BMX and 66i68. Seeds of soybeans (<em>Glycine max</em> (L.) Merrill) were treated with three concentrations of the glucose (0.05, 0.10 and 0.20 mmol L<sup>-1</sup>), and a control with distilled water. Tests of seed germination and vigor were carried out: it was calculated the germination percentage (first and final counting), percentage of normal seedlings; and speed of germination, length of the primary root and the aerial part of seedlings were recorded. The experiment was arranged in a completely randomized design with three treatments and five repetitions depending on the test. Increasing doses of the plant growth regulator influence the germination and can increase the speed of germination. The use of glucose in the treatment of soybean seeds, increases the rate of germination and emergence speed, growth of the root system and medium of seedlings. Soybean cultivar BMX seeds showed an increase in physiological performance with increasing glucose dosage.</h1> Pedro Henrique Gorni Denis Wesley Polimeno Copyright (c) 2023 Revista Brasileira de Engenharia de Biossistemas 2023-05-11 2023-05-11 17 10.18011/bioeng.2023.v17.1195