Phosphorite flour: formula, composition, properties, application

Phosphorite flour: formula, composition, properties, application
Phosphorite flour: formula, composition, properties, application

Phosphorite flour is widely cultivated in the ground before planting. The effectiveness of its action is noted on acidic soils, because the composition of the earth affects the decomposition of phosphorus to a state that plants quickly assimilate. This is the right groundbait for any seed crop without exception.

Phosphorite flour comes to the consumer in the form of a brown or grayish powder, it has no smell, it is practically insoluble in water. The advantage of this tool is that it has a long period of effective action. It is used as the main fertilizer for plowing and for the preparation of composts based on peat and manure. Since phosphates are slightly soluble in water, the fertilizer is absorbed by plants only in acidic soil. In such soil, phosphate rock (formula Ca3(PO4)2) is converted into dihydrogen phosphate.


phosphate rock

Phosphorites, which are the basis of fertilizer, lie in layers in the ground. They are mined together with clay, sand and other mountain minerals.breeds. Often, in addition to phosphorites, calcites, apatites and silica are found. In this case, they are mined in parallel, and processing plants are located near the mining sites.

Fertilizer is obtained by cleaning phosphorites from sand and clay, followed by crushing into pieces and grinding. This is how phosphate rock is made. The composition of the fertilizer includes quartz, calcium, gypsum and siderite.

Fertilizer is well fixed by the earth and remains where it is added. And this means that during irrigation, the product does not penetrate deep into and is not washed out of the soil. Prior to sowing, phosphorite flour is applied deep into moist soil, to the root system of plants. This is due to the low mobility of phosphorus: the closer it gets to the roots, the more effective its action.

phosphate rock application

During a shallow application of fertilizer, part of it remains on the surface, dries quickly, which leads to the death of the roots. Therefore, surface feeding without deep incorporation is ineffective. The higher the grinding of flour, the better the decomposition of phosphorus under the influence of soil acid and the easier it is absorbed by plants.

Phosphorus is one of the main trace elements necessary for the formation of roots, plant growth and seed maturation. It controls metabolic processes and supplies the necessary energy, being an important source of nutrition. Some plantings require a significant amount of phosphorus, others less. But one thing is clear: without this element, plant life stops.

Important: phosphate rock, introduced into the ground in excess, will not cause any harm,fertilizer is absorbed in the required volumes and helps to reduce the harmful effects of acidic soils. The fertilizer demonstrated its positive effect due to its use on soddy-podzolic soil, swampy and alkaline chernozems.

Lack of phosphorus affects plants not in the best way. Their growth slows down, roots are poorly formed.

Signs of phosphorus deficiency

phosphate rock fertilizer

If you know the signs of deficiency of any nutrients, they can be quickly added. Phosphorus deficiency in the earth is manifested in the following:

  • Plants change their color towards dark green or purple.
  • Changes the appearance of the leaves, they fall prematurely.
  • Bottom sheets are covered with dark spots.
  • The plant does not grow and begins to bush.
  • The rhizome is so poorly formed that the plant falls out of the soil.

Causes of phosphorus starvation in plants

These signs are easy to eliminate if phosphorus flour is added in time. Causes of phosphorus deficiency include:

  • The transition of phosphorus into indigestible forms.
  • Incorrect addition of fertilizers.
  • Soil depletion as a result of active land use.
  • Removal of phosphorus with the crop without its subsequent addition.
  • The soil is cultivated with inorganics.

Good Features

  • The addition of phosphorus helps increase yields.
  • Produces disease resistance.
  • Significantly increases the % sugar content of root crops.
  • Saturates the plant with essential trace elements.
  • Slows down harvest time.
  • Promotes resistance to frost, drought or moisture.
  • Reduces leaching of beneficial elements from the soil.

Phosphorite flour, the properties of which were discussed above, does not absorb moisture. During long-term storage, it does not lose its characteristics: it does not dissolve in water, does not emit toxins, is not explosive, but very dusty.

Categories of phosphorite fertilizers

phosphate rock formula

Phosphorite fertilizers behave differently with water, therefore they are divided into:

  • Fertilizers are highly soluble. They belong to universal dressings, and they are recommended to be applied to acidic and alkaline soil.
  • Fertilizers are sparingly soluble. These include phosphorus and bone meal, used on acidic and gray-forest soil. Plants will be able to obtain phosphorus after exposure to the acidity of the soil or the acid secreted by the roots.

Phosphorite flour is evenly scattered on the surface of the soil and then dug up, based on the calculation of 30 kg per hundred square meters of land. This is best done in the spring, before planting. Adding flour and slaked lime at the same time is not recommended.

Crushed phosmuka, falling into the ground, is easily absorbed by plants. The better it is mixed with the soil, the greater the effect of its use.

Is environmentally friendly phosphate rock. Its use does not lead topollution of soil and water with toxins. It does not violate the ecological balance, and this is its important advantage over water-soluble fertilizers.

Bone Meal

phosphate rock composition

When extracting phosphorus from organic compounds of biological origin, bone meal is obtained. Made from recycled cattle bones, this fertilizer is actively used for all cultural plantings. In addition to phosphorus, bone meal is also a source of nitrogen and calcium and is ideal for feeding root crops such as potatoes, tomatoes and cucumbers.

To maintain and grow home flowers, bone meal is used more often than expensive phosphorus top dressing. Its beneficial effect on large plants growing in a tub is especially noticed. It should be borne in mind that compost, peat or manure is applied in kilograms, bone meal must be calculated in grams or spoons.

Grass Fertilizer

Nature itself enables gardeners to prepare phosphorite fertilizer from weeds. As a basis, those herbs are taken that contain a lot of nitrogen. Adding such plants will only improve and enrich the compost. Natural phosphate fertilizers include the following plants: rowan fruits, hawthorn, wormwood, thyme and feather grass. By using these herbs, you can get nutritious compost without adding chemical fertilizers.

Safety measures

phosphate rock properties

Phosphorite flour is of low toxicity, has hazard class 4. But when working with it, you needwear a respirator and a protective suit to prevent flour from entering the respiratory tract. If it does get into the nose and eyes, they must be rinsed with water and leave the treated area.

Phosphorus-enriched soil is the exception rather than the reality. But thanks to the systematic addition of fertilizers, the amount of phosphorus required for normal growth and maturation of plants accumulates. Therefore, it is not required to make it annually, once every three to four years is enough. Timely top dressing will help to harvest a harvest worthy of your own labors.

Popular topic