Once, in 1669, a certain alchemist H. Brandt made the following experiment: he evaporated dry urine, mixed the precipitate with sand and coal, and then heated this mixture in a closed retort. As a result, he received a substance that had the magical ability to glow in the dark. So for the first time phosphorus was obtained. More than three hundred years have passed since then, now this chemical element is widely used in various fields of industry, as well as in agriculture. Let's talk about what superphosphate can give at the summer cottage and how its varieties differ from each other. We hope this article will be very informative for all people who are engaged in growing crops in their garden.
Fertilizer with the super attachment
The popularity of this substance is due to the fact that, firstly, it is non-toxic, resistant to fire and explosion, and secondly, it is suitable for almost any type of soil. The use of superphosphate allows you to get very high yields of corn, beets, potatoes, flax, vegetables, grains and other crops. Moreover, experts recommend combining the use of this substance as part of the main feeding for good results with the addition of a small amount in the wells or rows immediately before sowing. Perhaps by this time you already had the question of how much fertilizer should be applied. Note that the use of superphosphate directly depends on the level of soil fertility, the use of organic additives and the crop grown. In addition, the type of fertilizer used should be considered. For example, for vegetable crops, the average dose is 40-60 (when there is a simple one) or 20-30 grams per 1 m 2 (if you plan to use double superphosphate).
The use of this fertilizer is recommended in areas where the yield depends on the sulfur content in the soil, which plays an important role in the cultivation of Pancake week, grain and leguminous crops. It is better to add superphosphate in rows - in this case
, the phosphorus
utilization factor is several times higher, compared with the use of scatter before plowing. At the same time, this fertilizer should not be abused. Especially if you take into account that for 2-3 years the phosphorus absorption coefficient in superphosphate is about 40%.
Composition and varieties
In addition to its main component, this fertilizer also contains nitrogen, sulfur, magnesium and calcium. Depending on the percentage of
phosphorus assimilated by agricultural crops
, superphosphate can be simple, double and enriched. The latter in its composition occupies an intermediate position between the two first. Today, this fertilizer can be purchased both in powder form and in granular form. In the first case, the use of superphosphate will cost the consumer much cheaper. Because of its easy mixing, this type of fertilizer is best for composting. On the other hand, in certain cases, a powder preparation is less useful than granular superphosphate. The use of the latter avoids caking, maintains good dispersibility, and it contains more phosphorus (up to 22%).