First, choose the best species JRT OEM Digital Laser Range Finder can measure faster, easier, and more effectively! Our Professional R&D team has over 16 years of experience on the laser and measurement field , so we can supply perfect OEM/ODM service according to user requirement ,and we have made out the mini size module in the world. Handheld Laser Meter,Handheld Laser Distance Meter,Laser Range Meter,Laser Distance Measurer Chengdu JRT Meter Technology Co., Ltd , https://www.irdistancesensor.com
Choose new seeds with fast growing speed, strong lodging resistance, light blue long, short growing period, not easy bifurcation, and good commercial quality, such as Zhangqiu Indus, Chinese giant onions and Hebei giant onions. The average block yields over 5,000 kilograms of fresh onions.
Second, choose fertilization
Nursery fields should be selected for deep, fertile, easy-flowing, loamy loam or sandy loam soil, and the former had not been planted with onion, garlic, leeks, and other liliaceous vegetable plots. Combining 6,000 kg of high-quality farmyard fertilizer and 30 kg of compound fertilizer in Mushi, the land is well-mixed and well-mixed to make 1-1.5-meter-wide and 10-meter-long rakes for field management.
Third, timely sowing
Scallion spring sowing seedlings, from sowing to planting time is short, so proper early sowing is essential, sowing in late March. The average sowing rate of 2.5-3 kilograms per mu can be planted on 6 acres of land. Spreading methods are used to sow pods before sowing. After the water is soaked, the seeds are mixed evenly with appropriate amount of ash or fine dry soil and repeatedly broadcasted several times to facilitate even distribution of the seeds and then covered with 0.5 cm thick fine soil. You can also sprinkle the seeds first. The iron rakes can be used several times. Both methods are finally covered with plastic film, which not only warms and moisturizes, but also emerges early. It usually emerges 6-7 days after sowing and emerges 1-2 days earlier.
Fourth, field management
When the onion sprouts halfway out, uncover the mulch to avoid burning the seedlings. After the seedlings were found, the spotted shoots on the onion seedlings were found to be seeded early to ensure that each onion seedling had roughly the same nutritional area. During the growth period, the management method of “giving priority to the promotion†was adopted. The groundwater was poured in a small amount of water and less fertilizer was used to keep the soil moist and ensure nutrient supply. As the temperature rises, onion seedlings gradually grow, the demand for fertilizer and water increases, and the amount of watering and topdressing should also increase accordingly. Generally, each time watering 30-40 cubic meters/mu, topdressing urea 5 kg. During weeding, we should pay attention to control weeds, which can be removed manually or weeded by herbicides. At the same time pay attention to control of earthworms, reduce the rate of weak seedlings, ensure that the green onion seedlings grow neatly and consistently, individuals are stout. One week before planting, stop watering and exercise the onion seedlings, which will help to rejuvenate the seedlings as soon as possible after planting.
The handheld laser distance measurer can measure distance,area,volume and pythagorean, and can switch to meter/feet/inch mode as you like.
Specially, there is three best-sale styles:
* Mini: D30 with our mini module U81 in it achieved the smallest size Laser Distance Meter in the world, which outlook is the same as a key,quite portable and cute. USB chargable design.
* Bluetooth: Diy Laser Range Finder With Bluetooth has been used to measure distances accurately in the both daily usage and industry application. The handheld laser distance measurer is widely used in variety areas, like project surveying, construction measuring, railway application etc.
* Longest: 150m equipped with a precise,easy- to-read digital LED display, which metal case brings you great hand feel.Power Supply: 2 x 1.5V AAA batteries.