With the economic development, urban greening has become the main project of urban construction in China, and seedling cultivation is the best entrepreneurial project. So how do you know how to make the seedlings in the nursery grow? Do not know, follow the Hui Nong network Xiaobian to see the precautions and points of the establishment of the nursery! Nursery concept The nursery is a land with a certain area and meeting the purpose of cultivating seedlings. It is an important place for seedling production, and an independent management unit that can meet various breeding and management of various afforestation seedlings through various technical means. In China, the nursery is temporarily divided into extra large nurseries (planting area ≥100hm2), large nursery (60-100hm2 seedling area), medium nursery (20-60hm2), small nursery (10-20hm2), and the minimum seedling area in Germany is less than 1hm2. Nursery, 1-5hm2 is a small nursery, 5-20hm2 is a medium-sized nursery, and more than 20hm2 is a large nursery. Selection of nursery plots The choice of nursery plots will affect our future seedling production, sales and other aspects, a good seedling plot should be promotional, so we should pay attention to the choice of nursery address, we need to analyze the selection in several aspects Consider the following factors. (1) Location of the nursery The nursery should generally be based on the principle of facilitating the main supply areas. Under the premise of satisfying the seedling production, it should be close to the main traffic connection points, and it can be chosen in the township or some residential areas. (2) Topography In the choice of nursery terrain, we are best in a place with flat terrain, good drainage or a natural slope <3 degrees. In the area where the soil is clay, we can choose some plots with a slope of 3-5 degrees according to local conditions, or choose some places with steep slopes but can build terraces. The north is suitable for southeast break, and the south is suitable for east slope, north slope or northeast slope. The high mountain area is suitable for the southeast slope or the southwest slope. Those plots with low terrain and easy water accumulation and poor light conditions are not suitable for nursery. (3) Soil The soil has been specifically described in the previous issues. The loam with the agglomerate structure is the best, the thickness is at least 50cm, and the PH value is between 6-7.5. (4) Water source Site selection should be in areas where irrigation conditions are more convenient. If there are rivers, canals or reservoir ponds, first consider the above-ground water source and then consider groundwater. In the case of insufficient irrigation water source, the use of tap water requires attention to plant poisoning caused by irrigation during the period of production. (5) pests and birds and beasts If the number of underground pests exceeds the standard allowable amount or there is serious blight, root rot and other pathogen infections are not suitable for nursery. If measures are taken to clear the pests, you can choose not to choose the habitat of the birds. Land where rodents have occurred or where animal damage is more serious. Every grower wants to cultivate good seedlings, so pay attention to the above problems when setting up a nursery, and have a look!
Long distance LiDAR sensor series are particularly easy to communication thanks to their fixed connector, which can be plugged it up and off by yourself. Voltage is wider from 8v before to 36v. Low power consumption feature makes it beceome a very competitive, high performance-price ratio, long range Laser Distance Sensor.
Highlights:
> Measurement frequency: 400 Hz (Max 60m 3000Hz)
Parameters:
Accuracy
±10cm(<50m) /±1%(>50m)*
Measuring Unit
cm
Measuring Range (without Reflection)
0.1-200m
Interface options
Serial/usb/rs232/rs485/bluetooth
Measuring Frequency
400 Hz
Laser Class
Class I
Laser Type
905nm
Weight
About 20g
VInput Voltage
8V-36V
Resolution
1cm
Size
43*35*21mm
Operating Temperature
-15℃~50℃
Storage Temperature
-40℃~85℃
Chengdu JRT Main Ranging Modules: Industrial Laser Distance Sensors, Laser Rangefinder Sensor, Tof LiDAR Sensors.
Speed Laser Sensor,Long Range Lidar,Long Range 3D Lidar,Long Range Radar Sensor Chengdu JRT Meter Technology Co., Ltd , https://www.accuracysensor.com
> Long range: 200m
> High temperatures: -10~+50℃
> UART output
> Connector design: easy to use