Phosphorus fertilizer contains phosphorus – accelerates the formation of fruits, improves the quality and increases the amount of the crop, gives plants resistance to frost and drought. Phosphorus fertilizers must be applied deep into the soil – closer to the root system, since phosphorus is immovable in the soil.
Superphosphate is a type of phosphorus-containing fertilizer, in which the share is 20%. It’s usually is in granular form, although sometimes there is powder. The color varies from light gray to almost black. Superphosphate is dissolved in water before administration, but in the soil it becomes less soluble. As the main fertilizer it is brought in autumn for 30-45 g / sq. m. If the year is yielding, additional fertilizing is carried out together with potassium fertilizer at the rate of 15-20 g / sq. m.
Double superphosphate contains twice as much phosphorus (up to half the mass), and its properties do not differ by its properties from conventional superphosphate, only it needs to be taken 2 times less.