What is done, and in what forms, there potash fertilizer?The use of these substances in agriculture has an important place, t. To. Oxide, potassium is essential for proper development of many plants.Raw materials for manufacture of the products obtained in the Urals, in the form of salts, kainite, sylvinite, karlinita, sheinita and others. Of them by grinding mechanically isolated simple products (Cain and sylvinite) and substance with a complex chemical composition.
What potash fertilizers produced the modern chemical industry?This is primarily Potassium-magnesium (potassium oxide - to 25-26%, the content of magnesium - about 11-18%, does not contain chlorine) Kalimag (potassium hydroxide is about 24%, also has no chlorine in its composition), potassium salt (combinedformula of sylvite and potassium chloride, potassium oxide - more than 40%, the high content of chlorine).
Potash fertilizers for tomatoes are mainly represented by potassium chloride and potassium sulfate.The first is a white crystalline powder, soluble in water.Potassium chloride from sylvinite made by removing the impurities, resulting in a concentrate with a high proportion of mineral substances (up to 62% of potassium oxide).This material was poorly absorb moisture, so do not be compressed, may be stored in a plastic container and easily transported to land.
Potash fertilizers for tomatoes in the form of potassium chloride is made in the autumn, to allow excess chlorine "left" in the lower layers of the soil and were not available to plant roots.And here is another matter - potassium sulphate - the disadvantage of chlorine content in the chemical composition, no, that allows him to be the most widely used fertilizer in its class at the moment.
Portions of potassium sulfate is used as the main or the spring-summer potash fertilizers for tomatoes.Their chemical composition (about three percent of magnesium, 18% sulfur, and about 50% potassium oxide) to prevent wilting of leaves and obtain a good harvest.The amount of fertilizer is chosen individually in each case, depending on the climatic conditions, soil acidity, stage of crop rotation, plant varieties and other fertilizers.For example, manure (nitrogen group) reduces the efficiency of absorption of potash.Alfalfa planted to tomatoes, take a lot of potassium from the soil and crops, on the contrary, are not sensitive to this element.
to potash fertilizers for tomatoes were the most useful, it is necessary to calculate application rates.For this purpose, it is desirable to know how much potassium contained in the soil (the study can be ordered in special laboratories).Then you need to decide by how much material you need to clean this class (say 20 grams of potassium per square meter) and to calculate the required amount of fertilizer.In our case, that the plant received 20 grams.Potassium is necessary to take, for example, 40 grams of potassium sulphate, t. To. He is only half of the desired oxide us element.A simpler, but less accurate way to determine the rules is to follow the guidelines on the packaging of a particular type of fertilizer.
