Soil selection
First of all, the land should be selected. It is best to have loose soil and good drainage. Sandy loam or loam with high humus content should be used. It's better to have planted beans before p>
Land preparation
The courtyard land should be turned over in time, and the crops planted before should be turned over after harvest. The general depth is 25 to 30 cm. And before preparing the land, we also need to eat an appropriate amount of high-quality rotten organic fertilizer, and let it be evenly mixed into the soil p>
Soak in water
Before sowing, the seeds should be treated first. Generally, after drying for a day or two, they should be soaked in warm water for three hours. After treatment, wrap it in wet and clean gauze and start germination. It is recommended to spray water frequently in the environment of 20 to 25 degrees to keep the seeds in a relatively wet state. After the seeds are basically white, they can be sown p>
Temperature
When sowing, you should first look at the temperature. Generally, you can sow when the average temperature is more than 13 degrees. Generally, it can be sown in the middle and early ten days of May. If it is too early, the bolting rate will be relatively high. If it is too late, the growth time is not enough, and the quality will decline p>
Shade
To implement equal distance ditching in the courtyard land, cover it with a layer of 1.5cm fine soil after uniform sowing, and then step on the soil with your feet. After that, you need to cover the border with a layer of wheat straw, or you can plant oil cabbage with carrots to help it shade p>