Explain the common methods employed to detect the seed viability. Also discuss the factors affecting the seed germination.

Methods for detecting seed viability:

1. Germination Test: This is the most common method used to determine seed viability. Seeds are placed in a controlled environment with optimal conditions for germination, including adequate moisture, temperature, and light. The percentage of seeds that germinate within a specified time frame indicates viability. However, this method doesn't always account for dormant seeds, which may affect accuracy.

2. Tetrazolium Test: In this method, seeds are soaked in a solution of tetrazolium chloride, which is converted to a red pigment by actively respiring tissues. This allows for visual inspection of the seed's internal structures to assess viability. However, it requires specialized equipment and may damage the _____ _____ ________ ____ ________ ________.
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