This systematic review aimed to examine recent advances (2021–2025) in the conversion of agricultural biomass into biomaterials, biofertilizers, and bioproducts. Studies were included when addressing biomass types, pretreatment methods, conversion technologies, or resulting applications. Non-agricultural biomass, non-original research, and works outside the defined timeframe were excluded. Literature was identified in Scopus and Web of Science, complemented by Espacenet, Google Scholar, and institutional databases (USDA, FAO, IRRI, ABARES, UNICA, and CONAB, among others), totaling 108 documents referenced in this work. Risk of bias was minimized through predefined eligibility criteria and full-text assessment. Results were narratively synthesized, supported by figures and tables highlighting technological trends. Studies involving a wide range of agricultural biomasses (e.g., rice straw, corn stover, wheat straw, and sugarcane bagasse) were evaluated. Main outcomes included the development of bioplastics, biofoams, composites, hydrogels, bioceramics, biochar-based fertilizers, organic acids, enzymes, and green solvents. Evidence consistently indicated that pretreatment strongly influences conversion efficiency and that enzymatic and thermochemical routes show the highest potential for integrated biorefineries. Limitations included heterogeneity in biomass composition, variability in methodological quality, and scarcity of large-scale studies. Overall, findings underscore agricultural biomass as a strategic feedstock for circular bioeconomy models, with implications for sustainable materials, renewable energy, and low-carbon agriculture. Continued innovation, supportive policies, and improved logistics are essential for scaling biomass-based technologies.

The aim of this study was to evaluate a sensor for measuring soil pH composed of two Sb electrodes, comparing it with the standard laboratory method in order to validate it for using in Brazilian soils. Initially, sensor evaluations were carried out at bench scale and later in the field. On bench, consistent values were obtained with the pH standard method when the sensor’s measurements were carried out in friable soil. The field-level evaluation indicates that the readings performed with the Sb electrodes indicated a consistent result with the laboratory analysis. The results obtained with the Sb ISE sensor indicated adequate accuracy and precision in the soil pH determination, under the evaluated humidity conditions. The pH data collection with the Sb ISE provides a greater sampling density, allowing the creation of more detailed maps in a more sustainable and faster way compared to the traditional method. <!----> <!----> <!----> <!---->

Frente ao avanço da agricultura de precisão como forma de otimizar a obtenção de dados, o uso de terras e a aplicação de insumos agrícolas, os sensores surgem como ferramentas promissoras. O objetivo deste trabalho foi avaliar a potencialidade do uso do sensor para pH, composto por dois eletrodos de antimônio (Sb) associado à solução TSM, para estimativa da acidez potencial do solo. Para isso, foram realizadas avaliações do sensor em estrutura de bancada, para avaliar métodos de medida, avaliando o tempo para resposta do sensor, a concentração da solução TSM e sua forma de adição, de maneira a fazer com que o solo exerça seu poder tampão. Para estimar a acidez potencial, foi verificado que o sensor apresenta exatidão nas medidas em 15 s de contato com a amostra. As adições da solução diluída na proporção 3:1 (água destilada: TSM) apresentaram menor interferência na medida, comparado às adições da solução concentrada. Foi possível verificar a potencialidade do sensor como ferramenta para medidas da acidez potencial, por meio do sensor em 15 s de contato com a amostra de solo em condição friável e adição da solução TSM diluída (3:1).