When farmers use water-soluble fertilizers, they often do not know the quality of water-soluble fertilizers. Unqualified water-soluble fertilizers are not only harmful to agricultural production, but also cause environmental pollution and even bring about greater losses. Therefore, how to distinguish true and false water-soluble fertilizers and buy water-soluble fertilizers with assured quality is a common concern for farmers. On this issue, a reporter recently spoke to Song Shuling, head of the soil fertilizer station at the Agricultural Technology Promotion Center of Zibo City.
What to choose fertilizer
The water-soluble fertilizers currently sold on the market include: a large number of water-soluble fertilizers, trace elements water-soluble fertilizers, medium-element water-soluble fertilizers, humic acid-containing water-soluble fertilizers, amino acid-containing water-soluble fertilizers, and organic water-soluble fertilizers.
First of all, look at the packaging logo. Many products do not need to be opened for packaging. From the logo alone, it can be seen whether it is a regular product.
For example, a large number of elements of water-soluble fertilizers, first, we must look at the contents of nutrients on the bags of a large number of elements and trace elements. According to the standards of water-soluble fertilizers for a large number of elements, the single nutrient content of nitrogen, phosphorus, and potassium can not be less than 6%, and the sum of the three can not be less than 50%. If a certain element in a large number of elements is less than 6% , or the sum of three elements is less than 50%, indicating that such products are unqualified. The content of trace elements refers to the sum of the contents of copper, iron, manganese, zinc, boron, and molybdenum. The product should contain at least two trace elements with a content of 0.5% to 3.0%.
The second is to look at product formulations and register crops. Water-soluble fertilizers are registered according to the test crops, and may be one or several crops. Carefully purchase and use the unregistered crops, or use the previous experience to purchase.
Third, we must look at the implementation of product standards, product generic name and fertilizer registration certificate number. Most of the water-soluble fertilizers implement the industry standards of the Ministry of Agriculture, that is, the beginning of NY; the common name is the above; the fertilizer registration number, and the water-soluble fertilizers are all registered in the Ministry of Agriculture. The registration number is: Fertilizer (****) Pro ( Quasi) word ****. If farmers have doubts about the product, they can check their fertilizer registration number online.
Fourth, we must look at whether the package marked heavy metal content. The heavy metal content of water-soluble fertilizers produced by regular manufacturers should comply with national standards and be marked clearly. If the fertilizer bag is not marked with heavy metal content, please use it with caution.
In addition, the fertilizer can be dissolved in water. Qualified water-soluble fertilizers should be more than 95% soluble in water, the solution is clear and there are no residues or sediments, otherwise the fertilizer quality is not good.
Finally, see if the fineness of the solid fertilizer is even, and whether the liquid fertilizer is the same in color or whether there is precipitation or not.
1000Hz High Frequency LiDAR System
JRT High Frequency Range LiDAR Sensor is 2021 new product, that's a low-cost tof sensor but High frequency (up to 1000Hz). With 5cm high accuracy, the LiDAR Module can measure 80m.
Why the 1000Hz High Frequency LiDAR System:
* Widely used in many industrial automation system, like, UAV, delivery van, anti-lock break system, construction automation,intelligent toy robots etc.
* Small size: 43*35*21mm, can be easily integrated
* Invisible laser design: the laser type is 905nm,Class I
* High Frequency: 1000hz/1khz
* Low power design
Chengdu JRT Main Ranging Modules: Industrial Laser Distance Sensor, Laser Distance Meter Module, Tof LiDAR Sensor.
lidar sensor,tof sensor,lidar system
Chengdu JRT Meter Technology Co., Ltd , https://www.rangesensors.com