The importance and rates of application of mineral fertilizers on the site

Very often, supporters of natural conditions for growing vegetables, fruits, berries believe that the use of different "chemical" substances can harm human health and do not apply fertilizers to the soil. We will try to figure out how right they are and whether it is possible to harm the crop if we adhere to the rate of application of mineral fertilizers. And also what are the consequences of the lack of nutrients for plants.


  • Why does a plant need minerals
  • Types of mineral fertilizers
  • The rate of application of mineral fertilizers to the soil

Why does a plant need minerals

Plants are living representatives of nature, which belong to organisms - producers. Perhaps someone remembers from the course of biology that producers are capable of so-called autotrophic nutrition. Its basic principle is the natural process of converting non-living minerals into organic compounds. If such a synthesis takes place in a laboratory, then in addition to the inorganic elements themselves, energy is also needed.

In nature, the sun is the source of energy for plants, and the soil is the source of minerals. The solvent for them is water. Some of the inorganic compounds of plants are obtained from the ambient air. So that the soil is not depleted, it needs regular enrichment with the necessary elements.

In the wild, natural renewal of land resources is sufficient. In cultural plant growing, more minerals are required, since they are consumed much faster and in a larger volume. Indeed, in addition to growing green mass, cultivated plants produce fruits and seeds in a larger volume than their wild relatives.

Therefore, agricultural land requires an additional amount of minerals available to plants. If they are not added to the soil, then at best the yield will not be very large. In the worst case, the plants can get sick and not yield at all. In severe cases, crops can be threatened with death.

Therefore, fertilization is not only important, but also a necessary agrotechnical measure. If everything is done in accordance with the application rates, then there will be no harm to human health from such products. The need for mineral nutrition in all crops is different, therefore, fertilizers containing mineral elements are different.

Types of mineral fertilizers

Vegetable, berry, fruit crops need the following chemical elements:

  • nitrogen
  • molybdenum
  • phosphorus
  • manganese
  • potassium
  • magnesium

Mineral fertilizers can be conditionally divided into simple and complex. Microfertilizers can be distinguished separately. The composition of mineral fertilizers includes water-soluble salts of certain chemical elements. Simple fertilizers, their One-sided or simple fertilizers may contain salts of one element:

  • P - phosphorus
  • N - nitrogen
  • K - potassium

Video about the rate of application of mineral fertilizers:

Complex, they are also versatile, fertilizers include two or more nutrients. Fertilizers are produced in chemical plants. Their products are:

  • ammonium nitrate and urea, they contain nitrogen
  • superphosphate, phosphorus flour and double superphosphate, they serve as a source of phosphorus
  • potassium chloride is a source of potassium

Fertilizers, which are classified as complex, contain two or three nutrients in one chemical compound. For instance:

  • ammophos, in its composition ammonium phosphate
  • potassium nitrate, is a nitrogen-potassium compound

There is also a way to obtain complex fertilizers by mechanical mixing of one-sided fertilizers. This is also done in chemical plants. If we consider the application of fertilizers in terms of quantity, then it is more profitable and safer to apply complex fertilizers, since the application rates are significantly lower than when applying several simple mineral fertilizers.

The rate of application of mineral fertilizers to the soil

To determine exactly how much and what substances are missing in the soil and get recommendations for their introduction, you need to take soil samples from the site to a special laboratory. This is the best way to calculate application rates from the individual condition of the land in a particular area.

In addition, the analysis carried out will save you from unnecessary expenses for the purchase of fertilizers and oversaturation of the crop with excess chemistry. Also, the application rates depend on the type of plant and the yield of a particular variety. There is such a thing as the removal of minerals.

Removal cannot be calculated without the general fertility of the land on the site. If phosphorus can be added both 2 and 3 times higher than the plant's need, potassium is one and a half times more than the norm, then this cannot be done with nitrogen.

It only needs to be applied in accordance with the application rate. Otherwise, there will be an undesirable increase in green mass and a decrease in yield. In addition, nitrogen can accumulate both in the green parts and in the fruits, berries, and vegetables themselves.

And the accumulation of nitrates and nitrites in excess of permissible concentrations is harmful to health. Also, when calculating the rates of fertilization per 1 sq. meter, you need to take into account the concentration in the fertilizer of the main substance. Based on the above, it can be concluded that calculating the application rate will require knowledge of chemistry and mathematics.

In order not to harm the plants, the rate and method of applying mineral fertilizers for a particular crop can be viewed either on the fertilizer package, or on the seed package, where there are also sometimes appropriate recommendations. Modern industry produces a sufficient amount of new mineral fertilizers that satisfy all the needs of plants for inorganic substances.

These are the following complex mixtures for liquid and dry dressings:

  • Kemira suite
  • Effect A
  • NPK effect
  • All types of Agricola
  • Floretta sticks 1
  • Victoria sticks

Maintain the application rates indicated in the fertilizer instructions and grow a safe and rich crop.

Watch the video: Exhibition Ką pasėsi. 2019 (January 2022).