Precautions in preparing the soil. 1. should let the soil dry out completely, as it is a chance for some period, and if it can be tilled soil, bottom up flipping will dry it will be better. If the ground is wet streaks without a chance to dry to the accumulation of toxic gases such as H2S (hydrogen sulfide) and organic acids, etc. If there is a large amount of these substances, it will harm the roots of rice. 2. There should be straw fermentation Grasses, including organic matter degradation so complete. About 2 weeks after preparing the soil, tilled the soil so adjust the proper condition on the growth of rice and fertilizers can unleash that needed its early rice. 3. the soil acid soil acidic or any acid, low alkali (pH lower than 4.0) should be imprisoned water for at least 1 month before pinning black rice, so the reaction and the acidity of the soil decreases to normal conditions and relatively neutral first. The soil of this group if there is water all year round, or the detention has to do it twice-napi will reduce the acidity of the soil conditions and the occurrence of toxic substances can be reduced, which will give a higher yield of rice. Daredevil falls. Preparation of seedlings, strong trees. When the black embroidery will get rice that grow quickly and have the opportunity to give high yields of seedlings with vigorous growth and uneven height both convert. There is a plain short leaves. There is a very large root and root disease and insect destruction. -Preparation of the seed must be free of pure seed. There is a high percentage of germination (not less than 80 percent) without destruction of disease and insects. -Soaking and seeds Prepared rice seeds packed in a container, such as a bamboo basket weave. Hemp or burlap sack to soak in water for about 12-24 hours, then remove the seeds lay on water areas are not caged and with good air. Bring a sack hemp water until moist, cushioned by surrounding seeds coming water every morning and evening to preserve moisture. EnCase the seeds, long about 30-48 hours of rice seeds to germinate "blister" (with the root and the root is longer than the minor amount) with sow.
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