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Sunflower cultivation has been used as a raw material for the production of biofuels for some years. Currently, the crop has expanded in different countries as it has characteristics of withstanding extreme climatic conditions compared to other agricultural crops. However, sunflower grains, due to their high oil content, degrade more quickly in the post-harvest stages (Hussain, 2006). Thus, the drying is an important step in a program of production of sunflower grains. With the reduction in the water content of the grains is can store them for a longer time, increasing the marketing and product quality (Palzer

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This study aimed to evaluate the physiological performance of white clover seed lots of different tegument colours, besides to analyses the electrical conductivity test methodology with different seeds number, water volume and soaking periods. The experiment was developed at the Seed Didactic Laboratory in the Agronomy College “Eliseu Maciel” at the Federal University of Pelotas, in Pelotas-RS, Brazil. White clover seeds were manually separate, composing four lots of different coloured seeds: yellow, orange, brown and mixed. White clover seeds of yellow colour tend to present greater physiological potential through its germination and vigour. The electrical conductivity test was not efficient on identifying different vigour levels in white clover seed lots.