The numbers indicate the amount or percentage of macro elements nitrogen, phosphate, potassium, magnesium and calcium or micro elements iron, zinc, manganese, copper, boron and molybdenum in the fertilizer.
Regarding macro fertilizers, generally, the numbers on the packaging of 10 kg bags and more represent three nutrients (nitrogen, phosphorus and potash) . The first number refers to the amount of nitrogen, the second number refers to the amount of phosphate, and the third number refers to the amount of potassium. For example, 10-6-4 contains 10% nitrogen, 6% phosphate and 4% potassium.
In some fertilizers, apart from NPK, the word TE is also added to it, which means trace element or having rare elements or micronutrients.

Deciding which fertilizer to use can be a bit confusing. But it is better to say that all nutrients are necessary for all plants. This choice depends on the type of soil, the condition of your plant and your past nutrition. You can see the fertilizer recommendations for your product (in the fertilizer recommendation part on website) and see the fertilizers that should be used.
It is also important to pay attention to the time and method of use in addition to the choice of fertilizer.

Some farmers are interested in liquid or powder fertilizer based on the culture of different regions. This issue goes back to the experiences and weather conditions of each region. But in general, the difference between powdered (solid) and liquid fertilizers is based on the amount of elements in it. So that the amount of each type of fertilizer is different. For example, if foliar application of powdered magnesium chelate fertilizer is considered 1 kg per 600 liters of water, then 2-3 liters per 600 liters of water should be used for liquid magnesium foliar application.

The frequency of fertilization depends on factors such as the type of fertilizer, the type of plant, soil and watering conditions, and other factors. But there are times in plant nutrition that are important and they should receive a specific type and amount of fertilizer. These times and types of fertilizers can be seen in the fertilizer recommendations on this site.
An important parameter in the repetition of fertilization is the observation of the respectable gardener or farmer on the process of changes. For example, if a suitable fertilizer is used to eliminate the elemental deficiency and the deficiency is still observed after 10 days, the opinion of experts may be to repeat fertilization.
In general, it should be said that various parameters are effective in this regard. But paying attention to plant changes, past and present nutrition, soil analysis and plant conditions together makes it possible to make the right decision regarding the amount of fertilization.

Any type of fertilizer must be used by the plant at certain times and in a certain amount. The belief that consuming more will lead to better results is not true in all cases. For example, in a land or an area that is facing a severe shortage of nutrients, if the amount of consumption is somewhat higher than the general recommendation, it will probably produce a better result. But in another place, excessive use of a fertilizer may cause an imbalance between nutrients. And this matter over time will disturb the nutritional balance and have bad effects.

A simple example is traditional common fertilizers, which can cause serious damage if consumed in excess. But if the consumption is optimal and correct, the desired result will be obtained.

First, it is necessary to determine why the disease or the occurrence of the lack of elements in the plant or product happened. For this, you should review the amount of irrigation, fertilization and prevention for pests. Check the farms or gardens nearby to see if they have faced the same problem as you. It is very wrong to associate any jaundice with iron deficiency. Because all the lack of various elements and the occurrence of diseases and pests somehow cause yellowing in the plant. Diagnosing the type of jaundice is very important for treatment.
In these cases, it is recommended to get help from experts to determine the type of disease or deficiency and then take action to fix it.

Carefully read the instructions for using the fertilizer described in the label.
Pay attention to the time of fertilizer application. Using fertilizer at specified times increases its efficiency.
Pay attention to how to use the product. Some cases should be used in the form of irrigation or foliar spraying.
Be careful in choosing the right dose. It depends on the type of consumption and your irrigation system.
If you need advice, contact the technical unit.

Macro elements are elements that the plant needs more of and have higher consumption amounts in plant nutrition. which itself includes 2 subgroups: primary macro elements which include nitrogen, phosphorus and potassium elements. and secondary macroelements that include magnesium, calcium and sulfur.

Micronutrients or micronutrients include food elements that have a small amount of consumption in plants, but are very important and effective. And in addition to attention and consumption of macro elements, micro elements should also be used. The micro elements that are used as fertilizers and we face a deficiency include iron, zinc, manganese, copper, boron and molybdenum.

Spraying means spraying the combination of fertilizer and water in a specific ratio on plants, especially leaves (stems and fruits), which is called foliar feeding. Most elements can be absorbed by leaves, but foliar application of some elements such as iron, zinc, manganese, calcium and nitrogen are very important. Spraying is mainly used in unfavorable soil conditions (high soil pH or calcareousness, fixed elements in the soil) and the occurrence of deficiency symptoms.

The meaning of irrigation fertilizer or root fertilization means that fertilizer is used with irrigation water, which is done in traditional (submerged) irrigation and modern irrigation under drip and rain pressure. In this method, the fertilizer composition is absorbed through the roots. Some elements such as phosphorus are better absorbed by the roots and cause the development and strengthening of the roots.

Fertilizers produced by Sepehr Parmis Company can be mixed and used with most chemical fertilizers, humic acids or organic fertilizers.
It is recommended not to mix with herbicides.
It is strongly recommended not to mix with fungicides.
It can be mixed with insecticides.
But in general, it is recommended to do a mixing test in every mixing. Mix a small amount of fertilizer and the desired compound in a container, and if no reaction is observed (cutting, heat generation, gas generation, etc.), it can be mixed.
Avoid creating compounds that have too acidic pH or too alkaline pH.