Humic acid fertilizers are a type of fertilizer made by chemical treatments such as ammoniation, nitrification, and salinization, or by adding nitrogen, phosphorus, potassium, trace elements, and other modulators. They have the advantages of improving soil, improving nutrient utilization, and enhancing plant resistance Reversibility, promote soil beneficial microbial activity, increase yield and quality, and other effects. So, what methods can be used to quickly distinguish the quality of humic fertilizers from true ones?
Three methods to distinguish between true and false
Check the water-solubility. Put the humic acid fertilizer into the water, and observe the speed of dissolution, whether it can dissolve completely, and whether there is sediment. Usually good quality humic acid fertilizers perform well.
Check the color If it is humic acid water soluble fertilizer or powder, pour a small amount in clear water, the color of the water will turn brown and black. If the color is very dark, it may be dyed. If it is humic acid fertilizer particles, you can rub it hard with your hands. If the color fades and the color is difficult to wash off with water, there is also suspected dyeing. You can also crush the particles to see if the inside and outside colors are uniformly dark brown. If only the outside is black and white (or other colors), there is also a possibility of dyeing. It is particularly emphasized that there is a fertilizer on the market that is white granules. It is said that because of the addition of white humic acid, you must not buy it, because there is no such substance as white humic acid at all!
Judging whether it is activated Some humic acid fertilizer is added with humic acid powder that has not been activated or has a low degree of activation. The humic acid fertilizer made with it has a poor and slow effect. If the price of a certain humic acid fertilizer is ridiculously low, it is likely that an unactivated raw powder is added, so be careful.
Three characteristics to note
First, humic acid fertilizers have very different fertility due to different nutrient ratios and different production methods. Therefore, according to different crops and the growth period of the crops, different humic acid fertilizers and reasonable amounts should be used. Farmers and dealers must follow the instructions and do not increase or decrease the amount at will. Because humic acid belongs to the category of biostimulants, too high a concentration may inhibit crop growth, but too low a concentration will not play a role in stimulating crops, so the concentration must be in place.
Second, not every crop shows a direct effect on humic acid. Humic acid has the most obvious effect on rhizome crops, so the extension test should catch radishes, potatoes, sweet potatoes, melons with broad leaves, wheat, rice, etc. The less effective crops are oil crops such as rape and castor. Although there are practical effects, such as the speed, number, and length of root development, the data can only be detected by scientific methods, and it is difficult to identify with the naked eye.
Third, humic acid cannot completely replace chemical fertilizers and farm manures, and it is better to use them in combination with chemical fertilizers and farm manures.
Disclaimer: Some articles on this website are transferred from the Internet. If you have third party legal rights, please inform this website to deal with them. phone
Access Control Keypad is a security product that can be connected to a lock and unlocked by swiping card, password, fingerprint, mobile phone, etc. Residents can connect the access control keypad to the electric lock, Magnetic lock , etc., and then control the door opening by access control keypad.
The access control keypad also plays a very important role in the whole intercom system. If there are multiple doors in the building and residents need to be controlled to open all doors. For this project only needs to use one main Video Intercom System in the main door. For example, there are two doors in the building.
We can offer you with two solution for this project:
1. Customers can use 2 sets Video Door Phone for two doors
2. Customers can use 1 set video door phone and 1 set access control keypad,one for mainly door and another one for side door or basement.
Usually many customers will choose to use the second one solution. Because it can save more money for the whole project to the greatest extent.
There are many different solutions for the connected access control keypad, which can be modern access control keypad, open the door with a password or swipe card, and some customers like to be more intelligent, that is remotely unlock, which can work together with the video door phone to remotely unlock two doors through the mobile phone APP.
The following is our access control keypad, which supports password and card swiping.
The following are its parameters for your reference:
1. metal shell, waterproof
2. Touch the button
3. 1000\4000 users
4. anti-flapping door
5.external card reader
We are a factory specializing in the production, manufacture and research and development of Access Control System for 11 years. If you want to know more about us, please send us an inquiry, we are very honored to share the catalogue and price with you.
FAQ
Q: What is your service ?
a. we can offer OEM&ODM services
b. All software free provide , and technical support after-service
c. Online installation guide services.
Q: Whats the MOQ?
To ensure the best logistic cost, we suggest 100pcs(one carton).However, we are open to take orders with small qty.Welcome to sample order, contact with us.
Q: What payment terms are available?
T/T, Paypal, Western Union, credit card.
Q: How long is your production lead time?
Sample Order-Within 1-5 working days.
Bulk Order - 15-20 days for neutral items, 7 days if the items we have stock
Q: What's Your Products Warranty?
We Offer 12 Months Warranty after shipment sent.
Access Control Keypad,Gate Entry Keypad,Keypad Access Control System,Door Entry System Keypad
Zhuhai Mingke Electronics Technology Co., Ltd , https://www.mingke-tech.com