Mixing mineral fertilizers is usually carried out in order to combine 2-3 or more nutritional elements in one fertilizer in order to improve their physical and chemical properties and reduce labor costs for sifting. Preparing fertilizer mixtures does not cause any difficulties and does not require special knowledge of chemistry. You just need to strictly follow the rules.
Powdered and granular components are used for mixing. All mineral fertilizers, produced by industry, go on sale in packages called packages. The storage requirements for this fertilizer must be met; each package must be provided with appropriate markings or a label indicating the name, chemical composition and percentage of nutrients. If the fertilizer is complex, the percentage of all elements included in its composition must be indicated. This percentage is called the beneficial substance, or active principle. It serves as the main indicator by which the doses of applied fertilizers can be calculated.
In addition, there are many works on the calculation and preparation of mixtures, written by specialists and practitioners and published in periodicals and special publications. However, there are no two identical plots or two identical vegetable gardens, so you should delve into the recommendations and comments for individual mixture options. This will allow you to select the best possible components for preparing the highest quality and most effective mixtures.
Universal fertilizer mixture for vegetable crops
For use on a wide variety of soils and for all vegetable crops, you can create a fertilizer mixture that contains approximately equal proportions of nitrogen, phosphorus, potassium and trace elements - zinc, molybdenum, manganese, cobalt, boron.
Universal fertilizer mixture for peat and sandy soils
For use on peat and sandy soils, a fertilizer mixture is recommended that contains basic nutrients - nitrogen, phosphorus, potassium and trace elements - zinc, molybdenum, magnesium, iron, manganese, cobalt, boron.
Preparation of lime fertilizer mixture
The best option for lime fertilizer should be considered dolomite flour, which in addition to calcium also contains magnesium. The most widely used boron fertilizers are boric acid and borax.
For acidic soils, it is advisable to use limestone and dolomite flour and chalk. Slaked lime(fluff) is recommended to be used in the most extreme cases.
For alkaline soils, it is necessary to use a neutral calcium compound, namely gypsum.
Based on these recommendations, to prepare a lime fertilizer mixture, you should take 5 kg of lime fertilizer and add 40 g to it boric acid or 60 g of borax. Mix all components thoroughly, after which the mixture is ready for application.
As a rule, alkaline soils are widespread in the southern arid regions of Russia. In such places, instead of lime fertilizer (chalk, dolomite flour), neutral gypsum should be used in the same amount. It does not affect the reaction of the soil environment, but at the same time it is a source of calcium and sulfur. The remaining components must be taken in the same quantities.
Preparing a balanced mixture
Balanced mixtures are prepared from the most common mineral fertilizers. The weight percentage of the active substance is indicated on each package. It is always calculated for nitrogen (N), phosphorus oxide (P 2 O 5) and potassium oxide (K 2 O). All fertilizers must have three numbers on their packaging, separated by a hyphen. The percentage of nitrogen in a given fertilizer is always indicated in the first place, phosphorus in the second, and potassium in the third.
Suppose the package with nitroammophoska states 17-17-17 - therefore, this fertilizer contains equal amounts of nitrogen, phosphorus oxide and potassium oxide: 17% of each nutrient. If the package with diammonium phosphate indicates 19-49-0, then this fertilizer contains 19% nitrogen, 49% phosphorus oxide, but does not contain potassium.
To prepare balanced fertilizer mixtures, simple and complex fertilizers containing phosphorus should be used, in particular:
Nitroammophos grades A 23-23-0, B 16-24-0, B 25-20-0;
Nitroammofoska - 17-17-17;
Diammonium phosphate - 19-49-0;
Diammofoska - 10-26-26, 10-30-20;
Granulated double superphosphate - 0-46-0;
Ammophos - 12-50-0.
Simple granular superphosphate (0-19-0) is suitable for preparing mixtures for alkaline soils. Since simple granulated superphosphate has a low phosphorus content, any balanced mixture prepared on its basis will be low concentrated - it will be necessary to increase the dose of the mixture by 1.2 times compared to the standard dose. In addition, superphosphates have high acidity, which is usually neutralized with gypsum, therefore, along with simple superphosphate, a lot of gypsum enters the soil. For these reasons, this fertilizer is best used on alkaline soils.
For the preparation of balanced mixtures, azofoska (16-16-16) and other types of this fertilizer, as well as nitrophoska (11-10-11), are of limited use. Restriction is recommended because these fertilizers contain a lot of phosphorus, which is insoluble in water. The share of water-soluble phosphorus in azofosk does not exceed 75% of the total phosphorus content, and in nitrophosk the share of water-soluble phosphorus is only 60%. In addition, nitrophoska is an insufficiently concentrated fertilizer.
If there is a need to prepare a balanced mixture based on azofoska or nitrophoska, it is better to use it as part of a pre-sowing fertilizer, and not for fertilizing. In addition, the dose of application of the mixture prepared on the basis of nitrophoska must be increased by 1.2 times compared to the standard dose.
To prepare balanced mixtures, it is recommended to use simple nitrogen fertilizers:
Ammonium nitrate - 34-0-0;
Urea (urea) 46-0-0.
When using urea for mixtures, remember that it is produced in crystalline and granular forms. It is easier to work with granules, but a certain amount of biuret is formed in urea during granulation, an impurity harmful to plants. Therefore, when preparing a fertilizer mixture, it is better to give preference to crystalline urea. It is advisable to use mixtures based on it only on alkaline soils.
Sodium nitrate - 16-0-0 (27% sodium) - has limited use for preparing mixtures. By its nature, sodium nitrate is the best fertilizer for acidic soils, since it does not oxidize the soil, but alkalizes it. However, sodium nitrate has a low nitrogen content, which significantly limits its use for mixtures. It is advisable to use sodium nitrate only in combination with concentrated fertilizers.
Ammonium sulfate (21-0-0), like urea or ammonium nitrate, is a physiologically acidic fertilizer - it acidifies the soil. This side effect of nitrogen fertilizers is undesirable on acidic soils of the Non-Black Earth Region. Therefore, ammonium sulfate is not recommended as a component of mixtures for acidic soils for one reason: its acidifying ability per unit of applied nitrogen is more than twice that of ammonium nitrate and urea, which are similar in this regard. Ammonium sulfate as a nitrogen fertilizer is preferable to be used as a component of mixtures for alkaline soils.
To prepare balanced mixtures, it is recommended to use potassium fertilizers:
Calimagnesia 0-0-28 (9% magnesium oxide);
Potassium chloride 0—0—60;
Potassium sulfate 0—0—46;
Potassium nitrate 13-0-46.
In addition, manufacturers also produce potassium nitrate containing 37.5% K20.
Cannot be used in such mixtures. potash (0-0-50), or potassium carbonate, although this is an excellent potassium fertilizer that alkalizes the soil. The fact is that potash cannot be mixed with other fertilizers - when it is mixed with ammonium nitrate, ammonia volatilizes.
To prepare balanced mixtures, it is recommended to use magnesium fertilizers such as:
Potassium magnesium 0-0-28 (9% magnesium oxide);
Magnesium sulfate or epsomite (14% magnesium oxide);
Magnesium sulfate in the form of a reagent (16% magnesium oxide).
Microelements are needed to prepare balanced mixtures. First of all, boron should be included in the mixture; on acidic soils, molybdenum is also needed. However, other micronutrients may be required to correct nutritional deficiencies. According to agrochemical indications, you can add to the mixture the following microfertilizers:
Boric acid - contains 17% boron;
Sodium borate (borax) - contains 11% boron;
Molybdic acid - contains 53% molybdenum;
Ammonium molybdate - contains 52% molybdenum;
Sodium ammonium molybdate - contains 36% molybdenum;
Copper sulfate - contains 24% copper;
Zinc sulfate - contains 22% zinc;
Manganese sulfate - contains 21-24% manganese;
Ferrous sulfate - contains 21-24% iron;
Cobalt sulfate - contains 18-20% cobalt.
You can also add chelated iron compounds to the mixtures.
To prepare balanced mixtures, it is possible to use various options, but they are all united by one typical indicator: the main characteristic of balanced mixtures is the ratio between nitrogen, phosphorus and potassium, which should be close to 1.8: 1.0: 1.8. These mixtures must contain magnesium, the amount of which is balanced in relation to the main nutrients. The ratio between phosphorus and magnesium should be within 1: (0.2-0.5), i.e. if the amount of phosphorus is taken equal to one, then the amount of magnesium should be 0.2-0.5 of this amount.
The difference between different formula options usually lies in the concentration of nutrients. Preference should be given to the most concentrated ones - their full dose should weigh no more than 8 kg, while the concentration of the main nutrients - nitrogen, phosphorus and potassium cannot be lower than the ratio 13-7.5-13. The higher the concentration level of the balanced mixture, the less impurities enter the soil when it is applied.
In the process of preparing a complete balanced mixture, it is recommended to add the following to the full dose of the semi-finished product:
- 15 g of boric acid or 25 g of sodium borate (borax);
- 15 g of molybdic acid or ammonium molybdate or 20 g of sodium ammonium molybdate.
Mixing fertilizers
Good quality fertilizer mixtures can only be obtained from fertilizers that have sufficiently strong granules and a uniform particle size distribution (1 - 3 mm). Granular fertilizers should be mixed well in a circular motion. Please note that microelements in the form of powdered compounds tend to settle to the bottom of the container, so at the last stage of preparing the mixture, you need to mix it from the bottom up, lifting the fertilizers from the bottom. If the mixture was not consumed on the day of preparation, then before each reuse, stirring the mixture from bottom to top must be repeated.
Some mixtures become damp very quickly after preparation. It is quite possible that mixtures containing ammonium and potassium nitrate will become damp. This will inevitably happen if the mixtures are stored at high humidity. A mixture that simultaneously contains simple superphosphate and potassium chloride is particularly intense in water absorption - when these fertilizers are combined, a certain amount of calcium chloride is formed, which actively attracts moisture from the air. Working with such fertilizers is very difficult, so it is best to prepare the mixtures in small portions.
It is desirable that the fertilizers used to compose the fertilizer mixture do not have a tendency to caking. In addition, they should not have high humidity.
Some fertilizers either cannot be mixed at all, or can only be mixed in strictly limited proportions, since the compounds they contain are capable of entering into chemical interactions. This development of events usually leads to either the loss of nitrogen or the conversion of assimilable phosphorus into forms that are difficult for plants to access. Therefore, you should not prepare fertilizer mixtures without neutralizing additives from ammonium nitrate and superphosphate or from urea and superphosphate. To neutralize a possible reaction, you can use chalk, ground limestone, dolomite or phosphate rock in a volume of 10-15% of the total mass of the mixture.
You cannot prepare fertilizer mixtures from powdered superphosphate with ammonium sulfate, since this mixture hardens and turns into a dense mass. Before adding it you have to grind it, which is inconvenient.
The mixtures are easy to work into the soil when they disperse well. In order for fertilizer mixtures containing potash to disperse well, dry sifted peat or humus is added to their composition in an amount of 5-10% by weight. However, mixing mixtures containing nitrate with peat and humus is unacceptable. Some fertilizers, when mixed, improve their physical properties and increase their ability to disperse. This happens if you mix phosphate rock with superphosphate or ammonium nitrate.
To prepare mixtures of mineral fertilizers, it is advisable to select fertilizers that have the same structure. It is better to mix crystalline ones with crystalline and powdered ones, and granular ones with granulated ones. In this case, greater uniformity of sifting is achieved when applying fertilizers.
The number of components in the mixture will depend on the biological characteristics of the crop or on the method of application. For the main filling of the soil (main application), multicomponent mixtures containing three or more nutrients are most often prepared, and for fertilizing and pre-sowing application, two-component mixtures may be sufficient.
Knowing the mass of a certain volume of fertilizers, when mixing, you can use such measurements that will make it possible to quickly measure the required amount and prepare a mixture with a given ratio of nutrients.
When mixing fertilizers, certain rules must be followed in order to obtain a non-hygroscopic, well-dispersed mixture.
Do not mix ammonium fertilizers (ammonium nitrate, ammonium sulfate, ammonium chloride, ammophos) with alkaline fertilizers (with ash, lime, phosphate slag). When these fertilizers are mixed, nitrogen is lost in the form of ammonia gas.
A mixture of potassium chloride and alkaline fertilizers is unsuccessful, since the mixture turns out to be very hygroscopic and becomes damp during storage and does not disperse well. If preparation is necessary, it is not recommended to store such a mixture; it must be immediately dispersed and incorporated into the soil.
Ammonium sulfate should not be mixed with superphosphate and potassium chloride in advance. These mixtures must be prepared before applying to the soil. During storage they acquire unfavorable physical properties. They cake, turn into a monolithic mass and dissipate poorly. Good components for mixtures can be ammophos, diammophos, nitrophoska and nitroammophoska. They make it possible to obtain dry and bulk mixtures, and also provide a high concentration of nutrients.
It should be remembered that it is necessary to prepare any mixtures from dry fertilizers and store them under conditions that prevent deterioration of their physical condition: in dry, well-ventilated areas and preferably for a short time.
Schemecompatibility of fertilizers when mixed.
| № | Fertilizers | Fertilizer number | ||||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | ||
| 1 | Ammonium sulfate | M | M | M | M | ABOUT | ABOUT | ABOUT | N | M | N | N |
| 2 | Ammophos, diammophos | M | M | M | M | ABOUT | ABOUT | ABOUT | N | ABOUT | N | N |
| 3 | Nitrophoska, ammonium nitrate | M | M | M | ABOUT | ABOUT | ABOUT | ABOUT | N | ABOUT | N | N |
| 4 | Urea | M | M | ABOUT | M | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT |
| 5 | Superf-you | ABOUT | ABOUT | ABOUT | ABOUT | M | ABOUT | ABOUT | N | ABOUT | N | M |
| 6 | Phosphorite flour | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | M | ABOUT | ABOUT | ABOUT | N | M |
| 7 | Precipitate | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | M | ABOUT | ABOUT | N | N |
| 8 | Phosphate slag | N | N | N | ABOUT | N | ABOUT | ABOUT | M | ABOUT | ABOUT | N |
| 9 | Chlorine. potassium, potassium sulfate, potassium salt | M | M | ABOUT | ABOUT | ABOUT | ABOUT | ABOUT | M | M | ABOUT | M |
| 10 | Lime, chalk, ash | N | N | N | ABOUT | N | N | N | ABOUT | ABOUT | M | N |
| 11 | Manure, droppings | N | N | N | ABOUT | M | M | N | N | M | N | M |
M - can be mixed; O - you can mix only before application; N - cannot be mixed.
How to measure the right amount of fertilizer?
Of course, the most reliable thing is to have fairly accurate technical scales in use. The market currently offers a large selection of household electronic scales at a relatively low price. The need to have precise weights (weights) has completely disappeared.
If there are no scales, then the smallest error in determining the required amount of fertilizer will be made when using the volumetric method. To do this, you need to know the volumetric mass of fertilizers, that is, the weight of 1 cubic centimeter in grams (or 1 liter in kilograms, or 1 cubic meter in tons).
| Name | Volumetric mass |
| Ammonium nitrate crystalline | 0,82 |
| Ammonium nitrate granulated | 0,84 |
| Ammonium sulfate | 0,80 |
| Crystalline urea | 0,63 |
| Urea granulated | 0,65 |
| Calcium nitrate | 1,0 |
| Sodium nitrate | 1,20 |
| Ammonium chloride | 0,60 |
| Superphosphate powder | 1,20 |
| Granulated superphosphate | 1,10 |
| Precipitate | 0,85 |
| Potassium salt | |
| Potassium chloride | 0,95 |
| Calimagnesia | 1,50 |
| Cement dust | 0,60 |
| Furnace ash | 0,50 |
| Ammophos | 1,10 |
| Diammofos | 0,95 |
| Nitrophos | 1,15 |
| Nitrophoska | 1,20 |
| Nitroammophos | 0,90 |
| Nitroammofoska | 0,95 |
| Diammofoska | 1,00 |
| Phosphorite flour | 1,60 |
| Potassium sulfate | 1,30 |
Various available containers can be used as volume meters for bulk materials, such as mineral fertilizers. So, a thin or faceted glass with a rim will contain 250 cubic centimeters of liquid and bulk material, and a faceted glass without a rim - 200. One tablespoon holds about 15 cubic centimeters of liquid, and a teaspoon - 5. Bulk materials in a tablespoon with a top make up a volume of about 25 , and in the tea room there are 7...8 cubic centimeters.
A matchbox will hold 20 cubic centimeters of bulk material. To measure large quantities, you can use half-liter and liter glass containers and even a bucket pre-measured with water. Now it is enough to multiply the volumetric mass of the fertilizer by the volume of the selected container, and you will find out the weight of the measured fertilizer.
So, crystalline ammonium nitrate, measured with a teaspoon, will weigh (0.82 x 5) - 4.1 grams, in a tablespoon it will fit (0.82 x 15) - 12.3 grams, in a matchbox (0.82 x 20 ) - 16.4 grams, in an eight-liter bucket (0.82 x 8) - 6.56 kilograms, and so on. Simply select a suitable container to measure required amount fertilizers
What is the active ingredient of mineral fertilizer?
So, mineral fertilizer consists of the main substance, that is, salt, which includes a nutrient element, and impurities. The more main fertilizer substance and less ballast, the more valuable the fertilizer. But the fertilizer value ultimately depends on what the main substance of the fertilizer is.
Take nitrogen fertilizers as an example: in one case it can be ammonium sulfate, in another – ammonium chloride, in the third – ammonium nitrate. The nitrogen content in each of these chemically pure salts is: 21.2% in ammonium sulfate, 26.2% in ammonium chloride and 35% in ammonium nitrate. This would be the content of the active substance in fertilizers if they were chemically pure. However, the technology of their production and purification allows for incomplete removal of impurities, and sometimes the special introduction of certain additives into the composition to improve physical properties. Therefore, the content of active substance in fertilizers is usually lower.
In modern practice, the quality of fertilizers is relatively rarely expressed by the content of the nutrient element (with the exception of nitrogen fertilizers). Phosphorus, potassium, calcium, and magnesium fertilizers are assessed not by the content of elements (P, K, Ca, Mg), but in terms of their oxides P 2 O 5, K 2 O, CaO, MgO. This is the custom among chemists. Agrochemists also adhere to this. All industrial mineral fertilizers are necessarily accompanied by a certificate indicating the content of the active substance.
20 07.18
What fertilizers cannot be mixed?
0Do not forget that all fertilizers cannot easily interact with each other. Because they contain chemical elements that can neutralize each other, which can have a negative impact on the earth.
Every experienced gardener knows that it is not recommended to feed plants with fertilizers individually. To get a rich harvest in the fall, they should be mixed thoroughly. Before leaving them to be stored for a long time and preparing them for application, it is recommended to adhere to some simple conditions so that there are no serious problems in the future.
What rules exist
- The fertilizer must be stored in a separate container and have a label with the name. Children and animals should not be allowed to touch them;
- Fertilizers should only be kept in a dry room, since many types have the ability to dissolve;
- Before you add them to the soil, you need to inspect it. If it has caked and turned into lumps, you should knead it or break it with a hammer, and if it is wet, dry it well.
When combining different types of fertilizers, it is advisable to adhere to certain conditions, since if done incorrectly, it is possible to lose many useful substances. After all, they have the ability to evaporate, and some simply turn into a form that will be practically insoluble.
What errors may occur
Most even experienced gardeners can make stupid mistakes when applying fertilizer.
The main condition is the introduction of various mineral fertilizers into the ground, distributing them in equal amounts throughout the entire area. It is also recommended to dig it in immediately, and it is important to take into account the quality of the soil mixture.
For example, the beneficial substances of fertilizers will be perfectly absorbed and fixed on clay and heavy soils. Since they will advance throughout the entire earth quite slowly, their loss will not be great. But if the soil is sandy loam or sandy, fertilizers will be very weakly fixed and absorbed. But on the other hand, progress across the entire piece of land will be much faster, which can lead to huge losses of useful substances. Most often this happens in regions where the humidity is very high.
Foliar feeding is a great way to supplement plant nutrition with the necessary elements. However, the use of more than one component in a solution may cause precipitation in the form of insoluble salts.
If we want to apply several nutrients at the same time, it is better to use ready-made complex fertilizers for foliar feeding. They are balanced in composition, often have adjuvants for better fixation of the solution and a certain pH value, which affects the supply of nutrients and the properties of the solution. The choice of such fertilizers on the Ukrainian market is very wide.
However, it often happens that there is no extra money, but simple fertilizers are available. In this case, you can also prepare a solution for foliar feeding, but you must mix the fertilizers correctly. The compatibility of fertilizers used for foliar feeding is presented in the table: 
Compatible fertilizers are diluted in a common stock solution container. For limited compatibility and incompatibility, it is necessary to use a separate container of the mother solution. Concentrated solutions of phosphorus and sulfur fertilizers are not mixed in the same tank with calcium or magnesium. This will prevent the formation of insoluble compounds.
As for microelements, chelates are certainly more effective, but they also cost a lot. In fruit growing, for example, it is sometimes more economical to use inorganic salts in higher concentrations.
When preparing a mother solution of simple salts of microelements, it is necessary to observe the order of mixing the elements. First, 1.5 g of boric acid is dissolved in 150 ml of hot water and transferred to a 1-liter volumetric flask. Add 20 ml of concentrated sulfuric acid to the hot solution of boric acid (carefully and slowly along the edge of the flask). Separately, dissolve 0.2 g of zinc sulfate in 50 ml of hot water and pour into the previous solution. Then dissolve 12.5 g of iron sulfate in 150 ml of hot water and pour into a volumetric flask. Manganese sulfate (1.2 g), ammonium molybdate (0.2 g), cobalt nitrate (0.2 g), copper sulfate (0.2 g), potassium iodide (0.2 g) are dissolved (each salt separately) in 50 ml of water and mixed with the previous solution. Cool the flask with the solution of microelements and add water to 1 liter. The solution should have a transparent appearance. If this technology is not followed, a precipitate of insoluble salts will form after 3-5 hours, which is unacceptable. For 1 liter of water take 0.5 ml of a stock solution of microelements.
Using simple fertilizers for foliar feeding has a number of disadvantages. Low degree of purity, rather poor solubility, the appearance of salt deposits, chemical burn of leaves if the working concentration is not observed.
Recently, to reduce equipment passes, fertilizers are often mixed in the sprayer tank with plant protection products. If there is no data on drug compatibility, the following test is performed. The components of the mixture in quantities corresponding to field consumption rates are placed in measuring containers of equal volume, for example, 3-liter glass jars. After preparing working solutions of the required degree of dilution, the containers are closed and the contents are mixed, turning them over several times. The mixture is visually checked for homogeneity immediately and after settling for half an hour. Signs of incompatibility are: layer-by-layer separation of the working fluid, formation of a layer of foam, sediment or flakes.
It should be noted that any combination that separates within 30 minutes, but is easily mixed when the container is inverted again, can be used provided that it is constantly mixed in the spray tank. If non-dispersible oil, sediment or flakes form, the mixtures are unsuitable for use.
Before industrial use, any new combination in the form of a mixture should be tested on plants in the field in small plots.
"Info industry"
By applying fertilizers, It is important to follow some simple rules. Why is it important? Mixing some fertilizers is unacceptable, since in such a mixture processes can occur that will lead to the loss of nutrients or the nutrients will turn into a hard-to-reach form and will be less absorbed. The worst-case scenario is that applying incorrectly mixed fertilizers can lead to a deterioration in the physical properties of the soil in the garden. First of all, these are material losses that we cannot allow. And since we are reasonable housewives and owners, let us remember the basic conditions for mixing fertilizers:
Fertilizers that should not be mixed
- Ammonia forms of nitrogen fertilizers with lime materials and ash. Due to chemical reactions between them, a significant amount of nitrogen content will decrease.
- Superphosphate with urea (urea). A sticky mass is formed that you simply cannot apply evenly into the soil.
- Never mix potassium salt and nitrate with superphosphate in advance. The mass may become damp.
Fertilizers that can be mixed
- Bulk dry mineral fertilizers. If they are a little caked, sift them or chop them.
- Ammonium sulfate and ammonium nitrate with other ammonium phosphates and nitrates.
- Ammonium sulfate with urea (urea), granulated ammophosphates and superphosphate.
- Feel free to mix lime materials and ash with urea and potassium chloride. The only thing is to prepare the mixture before adding it to the soil.
- Poultry litter, manure and compost with granular superphosphate and potassium chloride. Also with carbamide (urea), but immediately before application.
| What | with what |
| Ammonium nitrate | Urea (urea), simple superphosphate, ammonium sulfate, lime, chalk, manure |
| Ammonium sulfate | Lime, chalk, manure |
| Urea (urea) | Simple superphosphate, potassium chloride, chalk, lime |
| Simple superphosphate | Ammonium nitrate, urea (urea), lime, chalk |
| Double granulated superphosphate | Lime, chalk |
| Potassium sulfate, potassium chloride, potassium salt | Lime, chalk |
To save time on gardening work, sometimes for proper application, fertilizers are often mixed. And that's reasonable. Now we will know how to do it correctly so that our fertilizers do not lose nutrients or become unsuitable for application.
Another small addition.
- Fertilize only when the soil warms up to +10C. At low temperatures, in cold weather, it is pointless to do this - the roots of almost all plants will not absorb nutrients.
- Try to apply mineral fertilizers directly at the roots of plants. Using a watering can for this purpose risks burning the plant leaves with splashes.
- If the soil is dry, moisten it before fertilizing. Fertilizing on dry soil can cause burns to plant roots.
By following simple mixing rules and fertilizer application rates, we will achieve excellent results in our vegetable gardens and orchards.
Well, the most important thing is to buy high-quality fertilizers and follow the instructions for their use.
We wish you good and healthy harvests!