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Drying and storage methods are fundamental for maintaining the grain quality until processing. Therefore, the aim of this study was to evaluate the associations of the drying temperature with storage systems and conditions as a strategy for preserving the quality of maize grain postharvest on laboratory and field scales. An increase in temperature accelerated the reduction in grain moisture, but increased the deterioration. The wetting during the storage period reduced the grain quality. Hermetic and aerated storage systems maintained the chemical quality of the grains. The control with healthy and whole corn dried at 80 °C and stored in silos with natural aeration provided a satisfactory quality, equivalent to those of controlled drying and storage under airtight conditions and at low temperatures. Different conditions of drying and storage of corn on the laboratory and field scales were evaluated, which provides an appropriate management of these operations to maintain the grain quality.

In Brazil and worldwide, commercialization of soybeans is of great importance to the economy, making their quality considered. The presence of damaged soybean seeds decreases the added value of the product. Businesses need fast and effective techniques to maintain the quality. The present research aimed to identify, through image processing, damage caused to soybean seeds, namely the presence of greenish seeds and wrinkled seeds due to variations of humidity and temperature, where it was possible to identify greenish and wrinkled soybean seeds from images. Results obtained for greenish seeds indicated that the red color scale is the most suitable for selection due to its more significant variation compared to the other color scales. For the separation of wrinkled seeds, it can be stated that it is possible to find a selection parameter with 74.3% accuracy in removing seeds with medium to high degrees of wrinkle damage.

The objective of this current paper is to evaluate, in real production scale, the management of soybean batches in the storage unit of harvested grains that are submitted to drying processes with different technologies, such an evaluation can contribute to minimizing energy and qualitative losses, and to ensuring the grain quality and sustainability of the postharvest system. The experiment was realized in full-scale production and the treatments utilized were lots moist soybean crop (SUL), RR dry soybean (SSLRR), RR2 dry soybean (SSLRR2), dried soybean in continuous dryer (SSS1) (11.0%), dried soybean silo-dryer (SSS2) (12.5%), dried soybean in silo aerator (SSS3) (14.0%). Energy losses and grain quality as a function of drying management ranged from 2.5 to 16.4% in energy, from 0.23 to 3.26% in crude protein and 0.15 to 3.05% in oil—the maximum yield of wet soybeans harvested from the crop (SUL) at 17% (w.b.). Considering the annual Brazilian soybean production, energy losses reach up to 162,282.50 m³ of firewood, approximately 2,116,963,470 kg of crude protein and 810,616,800 liters of crude oil. This would ensure lower losses and higher grain quality, including better yield of protein and crude oil, specifically reducing energy impacts by increasing the efficiency of the drying system. The current study concluded that the SSS1 drying system reduces energy-environmental impacts by 80.23%, reduces crude protein losses by 94.73%, and crude oil by 95.08%.

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O trabalho do homem, quando executado em condições inadequadas, pode gerar consequências para a saúde do trabalhador. Os operadores de máquinas agrícolas estão sujeitos a diversos riscos durante suas atividades. Dessa forma, o objetivo deste trabalho é avaliar as condições de segurança e ergonomia oferecidas ao operador de uma colhedora de forragem de precisão autopropelida. As variáveis analisadas foram as condições dos meios de acesso, do assento do operador e itens obrigatórios, que foram comparados com as exigências das Normas Regulamentadoras 12, 17, 31 e normas internacionais ISO. Dos meios de acesso analisados, apenas as dimensões dos travessões do sistema contra quedas e os degraus não possuem medidas adequadas. As condições do assento e presença de itens obrigatórios foram satisfatórias ao comparar com as normativas.

With the increase of the world population, we are looking for alternatives to supply the world's food demand. In view of this, and of the numerous benefits of the exploration of new crops as it happens with the pseudocereals, it becomes increasingly necessary studies on this subject, therefore, results that allow the implantation of these crops in the productive sector are of extreme relevance, with the purpose of facilitating its production, management and consequently its commercialization. The objective of this study was to evaluate the physical properties of amaranth and quinoa seeds. As results for the water content of 13.1% and 12.5% of amaranth and quinoa, the porosity results were, respectively, 35.5 and 39.7% and the slope angle of 25° amaranth and 28,26° quinoa. The length, width and thickness were 0.825 mm, 1.287 mm and 1.389 mm for amaranth seeds and 2.025 mm, 2.04 mm, 1.06 mm for quinoa. Sphericity was 93% for amaranth seed and 52% for quinoa. When the electrical property was evaluated, the permissivity values were 3.26 in amaranth and 3.10 in quinoa. The specific mass and weight of one thousand amaranth seeds were 804.7 kg m-³ and 0.78 g and for quinoa seeds of 720.7 kg m-³ and 3.01 g.