{"id":27554,"date":"2026-08-28T19:31:08","date_gmt":"2026-08-28T23:31:08","guid":{"rendered":"https:\/\/mmcereais.com.br\/2026\/feijao\/feijao-umidade-e-defeitos-podem-reduzir-o-valor-da-producao\/"},"modified":"2026-08-28T19:31:08","modified_gmt":"2026-08-28T23:31:08","slug":"feijao-umidade-e-defeitos-podem-reduzir-o-valor-da-producao","status":"publish","type":"post","link":"https:\/\/mmcereais.com.br\/en\/2026\/feijao\/feijao-umidade-e-defeitos-podem-reduzir-o-valor-da-producao\/","title":{"rendered":"Beans: moisture and defects can reduce the value of production."},"content":{"rendered":"

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Post-harvest of bean<\/a> This is a crucial step in transforming crop productivity into income. Even a high-performing crop can lose value due to problems with moisture, impurities, mechanical damage, defects, or inadequate storage, making quality assessment fundamental before negotiation.\n<\/p>\n

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This stage encompasses operations such as drying, threshing, cleaning, sorting, storage, transportation, and delivery to the buyer. Since different bean harvests reach the market throughout the year, quality control must be maintained from January to December.<\/p>\n

Bean quality begins with batch evaluation.<\/strong><\/p>\n

Beans are susceptible to physical damage, excess moisture, and insect infestations. Failures in drying or storage can rapidly increase the percentage of defects and lead to price discounts, batch rejection, or quantitative and qualitative losses.<\/p>\n

Therefore, before negotiating, the producer must know the conditions of their own batch. Evaluation allows them to decide whether to sell immediately or store, separate products with different quality standards, and check if further cleaning or drying is worthwhile. Key points of evaluation include moisture, impurity levels, mechanical damage, defects, color, size, odor, and the presence of insects.<\/p>\n

Grain moisture content requires attention.<\/strong><\/p>\n

Moisture content is among the most important post-harvest factors. Grains with excess water present a greater risk of heating, fungal growth, and weight loss during storage. High moisture can also cause operational problems such as compaction, deterioration, and the formation of hot spots within the batch. To check this parameter, it is ideal to use a portable grain meter. The evaluation should consider different points within the batch, since moisture uniformity is as important as the average value.<\/p>\n

Impurities reduce commercial value.<\/strong><\/p>\n

Straw, pod fragments, stem pieces, soil clods, stones, and seeds of other species are among the materials that can be found alongside beans. A high presence of impurities reduces the net weight of marketable product and can lead to discounts during sorting. When possible, supplementary cleaning using sieves, fans, or sorting machines helps remove foreign materials and improve the batch standard.<\/p>\n

Mechanical damage compromises quality.<\/strong><\/p>\n

Threshing, transport, and handling can cause breakage, cracking, and partial or total peeling of the grains. In addition to harming the product's appearance, this damage increases susceptibility to fungi and insects and can reduce the commercial value of the production.<\/p>\n

For the next batches, the producer should review the combine harvester or thresher settings, including cylinder speed and concave opening. It is also important to avoid falls from great heights and unnecessary transshipment operations.<\/p>\n

Defects need to be identified before the sale.<\/strong><\/p>\n

The classification also considers defects such as shriveled, malformed, moldy, fermented, burnt, sprouted, or insect-infested grains. These problems may be related to previous conditions, such as difficulties during flowering and grain filling, delayed harvesting, excess moisture in the field, failures in pest control, or drying problems. In post-harvest, the first step is to identify the proportion of defects and, when possible, separate the most compromised fractions.\n<\/p>\n

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Color and size influence the negotiation.<\/strong><\/p>\n

Appearance also plays a role in marketing. In the Brazilian market, characteristics such as color, shine, and uniformity are especially important in varieties like carioca and black beans. In carioca beans, for example, the market values the light-colored seed coat and defined spots. In black beans, uniformity and shine are important characteristics.<\/p>\n

Direct sun exposure, high temperatures, and prolonged storage periods can accelerate browning, especially in carioca beans. Bean size also affects value in various markets. Larger, more uniform batches tend to be more valuable, while highly heterogeneous products may suffer penalties.<\/p>\n

Insects and odor are warning signs.<\/strong><\/p>\n

A simple sensory inspection can help identify problems before delivery. Batches in good condition should not have a musty, fermented, or rancid smell. The presence of live insects, such as weevils and other stored grain pests, represents a serious disqualification factor and may lead to batch rejection. Insect dust, droppings, and perforated grains may also indicate current or previous infestation.<\/p>\n

Upon finding signs of infestation, the producer should seek technical guidance to define control measures, always respecting safety standards, product labels and leaflets, and the agronomic prescription.<\/p>\n

How to conduct a property valuation<\/strong><\/p>\n

Even without industrial infrastructure, the producer can perform a preliminary assessment of the batch. First, they should take representative samples from different bags, silo layers, or points in the pile and mix them to form a composite sample. Then, they should determine the moisture content with a portable meter and visually separate whole and healthy grains from broken, cracked, defective grains and impurities.<\/p>\n

Each fraction can be weighed on a simple scale to estimate its share of the total. Color, uniformity, size, and any signs of pests should also be noted. This procedure allows for comparison of the characteristics found with descriptions of commercial classes and official classification standards, helping the producer anticipate the classification that the buyer may make.<\/p>\n

Post-harvest determines when it is best to intervene.<\/strong><\/p>\n

Lot assessment also guides decisions before negotiation. When moisture is high, additional drying may be necessary before storage. Conversely, excessive impurities may warrant further cleaning.<\/p>\n

The presence of many broken grains should lead to a review of harvesting and handling procedures in future batches. For the current batch, the possibility of allocating the broken portion to markets with lower requirements could be evaluated.<\/p>\n

When there is a high incidence of mold-related defects, the tendency for deterioration during storage should be considered. In this situation, it is necessary to reduce humidity and improve ventilation, as well as evaluate faster sales.<\/p>\n

Storage preserves the commercial standard.<\/strong><\/p>\n

Even properly harvested and dried beans can lose quality under inadequate storage conditions. The storage area must be clean, free of residues from previous harvests, dust, or old grains that could serve as shelter and food for pests. Ventilation is also important to prevent hot spots. The producer should regularly monitor for insect infestations and protect the grains from external moisture.\n<\/p>\n

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Bags should not be in direct contact with the floor. Using pallets or platforms helps reduce this risk. Another precaution is to keep batches of different types, classes, and qualities separate. Mixing products with different standards can compromise the quality of a superior batch.<\/p>\n

Before sending the product to the buyer, the producer must check:<\/p>\n