To see the purity of seeds, remove 200 seeds from the spring seedlings and compare them with the main traits of the pure seed. Finally, count the purity of 100 seeds. The purity of seeds used in production should be controlled at more than 95%.

Look at the seed impurities first to remove a certain weight of spring seeds, then pick out the impurities, and then call their weight, and finally calculate the percentage of the seed's clarity. The degree of purity of seeds used in production should generally be above 97%.

See the seed germination rate using ordinary germination method, can use several plates, the plate is covered with filter paper or a layer of cotton, and add water to make it moist and then put a certain number of seeds neatly and evenly placed on it, put the plate on the near stove On the other side or on the fire, after 7 days, you can see the number of seed germination, and finally calculate the seed germination rate. Where the production of seeds, the germination rate should be above 95%.

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