The three numbers on fertilizer represents the value of the three macro-nutrients used by plants. These macro-nutrients are nitrogen (N), phosphorus (P) and potassium (K) or NPK for short.
The higher the number, the more concentrated the nutrient is in the fertilizer. For example, numbers on fertilizer listed as 20-5-5 has four times more nitrogen in it than phosphorus and potassium. A 20-20-20 fertilizer has twice as much concentration of all three nutrients than 10-10-10.
The fertilizer numbers can be used to calculate how much of a fertilizer needs to be applied to equal 1 pound of the nutrient you are trying to add to the soil. So if the numbers on the fertilizer are 10-10-10, you can divide 100 by 10 and this will tell you that you need 10 pounds of the fertilizer to add 1 pound of the nutrient to the soil. If the fertilizer numbers were 20-20-20, you divide 100 by 20 and you know that it will take 5 pounds of the fertilizer to add 1 pound of the nutrient to the soil.
Siman Ltd has started its activities in 1994 as a company for trade and distribution of chemical products. For this period we have been able to establish close collaboration and relationship with our customers and suppliers. While constantly trying to determinate and even predict the actual needs of our partners, we have ever been able to expand the list of the products we are supplying and to improve our service. As an end result of this consequent striving for perfectness we have implemented the system for quality management –ISO 9001:2008, which simply serves to one more time prove our commitment to maintain our highly professional level of customer service.
The main activity of Siman Ltd is trading with chemical products, non ferrous metals and fertilizers over the territory of Bulgaria and worldwide. We have well established partnership network in more than 30 countries around the globe. It’s exactly these relationships that make our main capital, capital that we count on.