I'll bet on it
1. The cover of the black membrane is mainly produced in greenhouses, with cultivation beginning in the north in december, with two harvests in the following month, with root being born in the current year or two to three years, no or only one cut in the autumn, and nutrient accumulation before winter. The winter soil freezes, cleans the fields, scavengers are laid, december berylles are cultivated through hibernation periods, using plastic sheds, and small arch sheds are built, black film is unlighted, and straw curtains are added to the membranes to keep them warm at night. The first was harvested for about 40 days, the second for about 30 days and the third for 25-30 days. It usually ends with three knives, and some people try to restore the platinum. Roots grow, a first knife is collected, black membranes are removed, radiant membranes are replaced, and platinum is grown. After a knife was planted to supplement the nutrients, the second knife was collected and the third knife was used to plant the birch. When the harvest is completed, it is converted to field planting, rooting and growing, and it continues in the following winter。
Ii. Cedar yellow cultivation
The scaffolding of the cellars is the flat digging of shallow wells, which are expanded under the pits into scaffolding cellars. Underground temperature is stable, planting is low risk,
The topography is high, the groundwater table is low, the earth layer is sticky, the structure is tight and the backwind is sunward. The cellars, which use a one-year-old or two-year-old plant, dig into the cellars after winter, store their roots in the cellars, which should be less dense, because they are unventilated, wet and too compact and perishable. At the bottom of a 3-metre-diameter vegetable cellar, 300 kg of molybdenum can be hoarded, with 1 hectare of molybdenum produced in daejeon and 60 places. The roots are piled up, sand is spilled on the roots, 13-15 centimetres thick, water is poured after the sand is covered, water should be kept strictly under control, less influence on growth and more prone to decay. (b) water should not be necessary if the stowage is damp at the bottom and can see water marks; if the base is sandy soil, it is leaky, it is water-watered in such a way that the clay is strong, it is less water-watered and the depth of the water is appropriate to match the roots. Water is watered with higher temperatures extracted from deep wells. The cellar is closed after hoarding and the temperature is maintained at 15 °c ~ 18 °c, and cauliflowers can grow but at a slower pace. If there is a need to increase the temperature of the cellar, artificial warming is possible。
After the hoarding has been completed, the slabs cover the cellar with 60 to 70 centimetres of thick soil. If the temperature is high, a small hole can be properly ventilated and the temperature reduced before sealing。
The cauliflowers enter the cellar for 8-10 days to check the moisture and temperature once, with wet roots and bright leaves, without having to water, dry roots, thinness and atrophy, indicating a lack of moisture and watering 300-400 litres; if there is more water at the bottom of the cellar, when there is a drop of water at the root, the water is spilled into the dry sand, and if there is more water, the earth in the centre of the cellar can be dug into a pit to collect water and sprouts with a spoon。
From the day of the hoarding, about 30 days to collect the first knife, 2. 7 metres in diameter of the cellar, 100 kg of yellow per cellar. After 25-30 days of first-cutting, a second cut, 50 kg per cellar, a third cut over 22-25 days, could produce 25 kg. After the third knife was collected, the slugs were thrown away。
