In order to prevent potato degradation, prevent ring rot, and solve the problem of insufficient supply of good varieties, we conducted the potato cultivar Shushu No. 3 from 2000 to 2002. The results were: the field disease was light, the yield reached 3,600 kg/mu, the tubers were large and even, and the commodity rate was high. Now introduce its cultivation techniques as follows: (A) nursery 1, choose to do bed. The land with flat terrain, loose soil, and convenient water sources was selected as the breeding ground. The seedbed was 1.2 meters wide and its length was determined according to the area of ​​colonization. Turn the ripening soil from the nursery to pull it out and use the raw soil to make the hoe well. Firstly pour into the mature soil, and then pad 10 cm thick horse dung and 5 cm thick nutrient soil (according to the quality farmyard manure: garden soil = 1:5. ), made of 30 centimeters deep hot bed. 2, sowing, management. In late April, select the potato with uniform potato shape, uniform size, and full shoots. Raise its buds upwards and neatly fill the nursery bed. Cover the nutrient soil (ibid.) 3-4 cm thick, pour enough water and use 50% more bacteria. Ling WP 800 times spray disinfection. During the nursery period, the soil should be kept moist and dry. The temperature should be kept at 10-20°C. If the temperature is too low, a small shed can be used to keep the seedlings warm. (b) Daejeon transplanting 1. Site-mulching. Deeply pour soil 20 centimeters, apply 3000-5000 kg/mu of organic fertilizer, and use calcium phosphate 20 kg/mu as base fertilizer. Remove weeds, stones and other debris. Make a width of 120 cm, a width of 110 cm, a height of 10 cm, and a ridge spacing of 40-50 cm. In order to save water, in the middle of the ridge, a deep ditch with a width of 10 cm is required for dark irrigation under the membrane during drought. Before ridging, the soil should have good sensation. If there is not enough squat, it should be irrigated first and then immediately after ridging. 2, transplanting. About 10 days after sowing, when the seedlings grow to 6-10 cm in length and there are 5-7 leaves, the potato pieces are cut out, the seedlings are plucked together with the fibrous roots, and transplanted to the ridges that are prepared in advance. Each ridge is planted. 2 rows, 30 cm spacing. When planting seedlings, first use a hole punch to drill 6-8 cm deep holes on the ridges, plant 1-2 seedlings per hole, fill wet soil after planting, and press the holes tightly to facilitate heat preservation and moisturizing. The seed potatoes after the axillary buds are returned to their original place and the seedlings can be planted 3-4 times. (III) Field management 1. Water management. After the potato is planted in the field, the seedling period must have good sensation. If necessary, the water can be injected into the membrane at both ends of the dark irrigation trench to fill the dark irrigation trench until the irrigation is completed. 2, top dressing. During the period of potato planting, urea 8-10 kg/mu and potassium sulfate 20 kg/mu were applied. When applying acupuncture, apply 10 cm from the plant or apply with a top-dressing gun; when using a furrow, open a furrow at a distance of 10 cm from the plant and inject it with water. 3, cultivating grass. Timely cultivating and removing weeds in the field are used to ensure the conservation of grasshoppers. The cultivator is used in combination with cultivating soil to increase the yield per plant. 4, pest control. During the growth of buds and potatoes, pest and disease prevention should be well done. Once pests and diseases occur, measures should be taken immediately to ensure that “early treatment and small treatment†can be achieved. The common diseases are potato late blight. When a central diseased plant occurs, it can be sprayed with 70% thiophanate-methyl WP 800-1000 times. (four) matters needing attention. The first is to strictly select seed potatoes according to the requirements, requiring pure seed potato varieties, smooth potato noodles, and no pests. The second is that the bud planting and seedling seedlings can sprout 2-4 pieces each time, and can continuously shoot 3-4 times, so the utilization rate of the seed potato is very high. Each time the axillary buds are returned to the seedbed in time, the seedlings are raised again. Thirdly, the seedling nursery period is usually 3-5 days earlier than the live broadcast. Therefore, the nursery period should be determined according to the date of planting and the number of days required for nursery to prevent premature colonization by late frost.
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