What are the common inspection methods for seeds?

Functional test: judging the quality of seeds by visual reflection of human sensory organs such as naked eye observation, biting, hand touch, nose smell and tongue taste. This is valuable experience accumulated by working people from long-term production practice, which has great practical value. For example, the water content of seeds can be judged according to the pressure when teeth bite seeds, the sound of crushing, and the smooth feeling when hands reach into seeds.

Generally, seeds with small water content are under great pressure when bitten, and will make a crisp sound after being crushed, which makes them feel smooth when they reach into the seed pile. As for seed cleaning procedures and pests, you can see them directly with the naked eye. You can also cut open the seeds for inspection. Good seeds are full, full of water and oil, bright in color and normal in smell.

Tiny seeds, such as azalea and eucalyptus seeds, can be placed on white paper and pressed with nails or hands. Oil stains on paper are seeds with full grains and sufficient oil. Another example is that when drug farmers identify the quality of the seeds of Achyranthes bidentata, they put the seeds into the fire respectively. Seeds with normal germination ability are exploded, and those without explosion lose their vitality.