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In this paper, a four-link furrow opener suitable for small planters is designed for the sowing needs of cabbage and other small-sized seeds. Firstly, the structural principle of the four-link furrow opener is introduced, secondly, the motion state of the four-link furrow opener mechanism is simulated through Adams simulation, and the device is improved on this basis. After the test, the furrow depth of the four-link furrow opener reaches the optimal depth of 0.05–0.10 meters, which is in line with the experimental expectations.

\"Accessible text and vivid photographs introduce readers to seeds describing how they spread and their different uses.\"--Amazon.com.

Research on the combination of biochar with organic compost has grown considerably in recent years, emerging as a sustainable alternative for managing agro- industrial waste. Among the generated residues, acai biomass composed of more than 80% seeds and fibers, is considered a major socio-environmental challenge due to residual accumulation. In this context, the present study aimed to investigate the effect of adding acai seed biochar to the composting process using the co-composting technique. The acai seeds were collected from small-scale commercial establishments in the municipalities of Belem and Paragominas. The experimental design included five treatments with biochar concentrations of 0%, 2.5%, 5%, 7.5%, and 10%, evaluating temperature, moisture, yield, and macro- and micronutrient contents. The addition of 5%, 7.5%, and 10% biochar influenced the thermal behavior of the composting process, with temperature peaks exceeding 40 [degrees]C, and optimized the sanitation of the compost. However, the incorporation negatively affected moisture retention. The volume of the final co-compost showed similar behavior across the treatments, with better yields observed at 5% and 7.5% biochar concentrations. A significant increase in nitrogen and a reduction in Na+ were observed in the treatments; however, elevated concentrations of heavy metals (Fe, Zn, and Mn) were also detected. Thus, although the compost- biochar blend represents a sustainable, low-cost, and highly effective technology, further research is needed to better understand the interactions between nutrients and biochar, as well as to assess the effectiveness of the co-compost in soil recovery. Keywords: Residue. Lignocellulosic Biomass. Sustainability. Euterpe Oleracea Mart. Pesquisas relacionadas a combinacao de biochar com composto organico vem crescendo consideravelmente nos ultimos anos, tornando-se uma alternativa sustentavel para a gestao dos residuos agroindustriais. Dentre os residuos gerados, a biomassa do acai, composta por mais de 80% de carocos e fibras, e considerada um grande desafio socioambiental, devido ao acumulo residual. Nesse contexto, o trabalho objetivou investigar o efeito da adicao do biochar de caroco de acai no processo de compostagem, pela tecnica de co- compostagem. O caroco de acai foi coletado em pontos comerciais de pequeno porte nos municipios de Belem e Paragominas. O delineamento experimental foi conduzido com cinco tratamentos, nas concentracoes de 0%, 2,5%, 5%, 7,5% e 10% de biochar, onde avaliou-se temperatura, umidade, rendimento e teores de macro e micronutrientes. A adicao de 5%, 7,5% e 10% de biochar influenciou no comportamento termico com picos acima de 40 [degrees]C, e otimizou o processo de higienizacao do composto. No entanto, a incorporacao afetou negativamente a retencao de umidade. O volume do co-composto final apresentou comportamento semelhante entre os tratamentos analisados, com melhor rendimento para as concentracoes de 5% e 7,5%. Houve um acrescimo significativo de nitrogenio e diminuicao de Na + nos tratamentos, entretanto, tambem apresentou elevadas concentracoes de metais pesados (Fe, Zn e Mn). Dessa forma, apesar do composto-biochar ser uma tecnologia sustentavel, com baixo custo e elevada eficacia, o desenvolvimento de novas pesquisas torna-se necessario para compreender melhor a interacao entre nutrientes e biochar, assim como testar a eficacia do co-composto na recuperacao dos solos. Palavras-chave: Residuos. Biomassa Lignocelulosica. Sustentabilidade. Euterpe Oleracea Mart. Las investigaciones relacionadas con la combinacion de biochar con compost organico han crecido considerablemente en los ultimos anos, convirtiendose en una alternativa sostenible para la gestion de los residuos agroindustriales. Entre los residuos generados, la biomasa de acai, compuesta por mas del 80% de semillas y fibras, es considerada un gran desafio socioambiental, debido a la acumulacion de residuos. En este contexto, el presente trabajo tuvo como objetivo investigar el efecto de la adicion de biochar de semillas de acai en el proceso de compostaje, mediante la tecnica de co-compostaje. Las semillas de acai se recolectaron en pequenos establecimientos comerciales en los municipios de Belem y Paragominas. El diseno experimental se llevo a cabo con cinco tratamientos, en concentraciones de 0%, 2,5%, 5%, 7,5% y 10% de biochar, donde se evaluaron la temperatura, la humedad, el rendimiento y los niveles de macro y micronutrientes. La adicion de 5%, 7,5% y 10% de biochar influyo en el comportamiento termico con picos superiores a 40 [degrees]C y optimizo el proceso de higienizacion del compost. Sin embargo, la incorporacion afecto negativamente la retencion de humedad. El volumen del co-compost final mostro un comportamiento similar entre los tratamientos analizados, con mejor rendimiento para las concentraciones de 5% y 7,5%. Hubo un aumento significativo de nitrogeno y una disminucion de Na+ en los tratamientos. No obstante, tambien se encontraron elevadas concentraciones de metales pesados (Fe, Zn y Mn). De esta forma, a pesar de que el compostbiochar es una tecnologia sostenible, de bajo costo y elevada eficacia, el desarrollo de nuevas investigaciones es necesario para comprender mejor la interaccion entre nutrientes y biochar, asi como para probar la eficacia del co-compost en la recuperacion de los suelos. Palabras clave: Residuos. Biomasa Lignocelulosica. Sostenibilidad. Euterpe Oleracea Mart.

After gathering lost seeds during the summer, a kind woman tends and instructs them throughout the fall and winter before sending them out in the spring to find roots of their own.