Dry seedlings before emergence will seriously affect the emergence rate, and the emergence of missing. Most of the seedling herbicides currently used are dicofol, and are closed after sowing. If the soil is dry, the uniformity of the formation of the drug layer is affected, and the weeding effect is reduced.
Therefore, the lack of water before emergence will affect both the emergence and weeding effects. However, extreme lack of water, when the soil is dry to the seed layer, watering should not be used for one-time pouring. First, pour half of the water. After the surface is wet for a few hours and then pour it, it will be soaked until watering does not cause phytotoxicity.
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