How to choose the right fertilizer product

The fertilizer for the road should be selected according to the characteristics of soil, crop and growth period. For example, vegetables, fruit trees and cash crops must be applied with organic fertilizers. Field crops should be applied with organic fertilizers as much as possible. Because organic fertilizers need to be decomposed, they should be prepared in advance; phosphorus and potassium fertilizers are mainly used as fertilizers for field crops, for fruit trees and vegetables. The base fertilizer is also used as a top dressing. Among the southern acid soils, phosphate fertilizers such as superphosphate or calcium magnesium phosphate containing calcium, magnesium and sulfur may be preferred, and quick-acting phosphate fertilizers or phosphate fertilizers with higher nutrient concentrations such as diammonium phosphate may be used in the northern calcareous soil; The choice of potash is mainly regarded as the chlorine resistance of the material. Beet, spinach, rice, wheat, corn and the like are not sensitive to chlorine. It is preferred to use potassium chloride with low price and high nutrient content, while tobacco, potato, berry, etc. avoid chlorine. Potassium sulphate should be used for crops and saline soils. The choice of potash fertilizer depends on the local rainwater or irrigation conditions. In areas with heavy rain or irrigation conditions, potassium chloride can be applied in the base fertilizer. In the dry or rainy, saline-alkali or vegetable greenhouse, potassium sulfate is used. it is good.

PVC High Speed Door

PVC High Speed Door are designed for indoor use and ensure rapid handling operations between different areas that should remain separated. These safe and efficient industrial doors are made of a shaped steel frame and covered with PVC. These high speed doors are safe and efficient and consist of a shaped steel frame covered with PVC. Safety is ensured by their photocells and barriers.

High speed doors protect us from harm, save energy and help us to separate processes for optimal productivity. A high speed door's most important job is to simply open and close quickly and safely every time you need it.

The high speed pvc roll shutter door require high strains, caused by the high operating speed and the frequency of openings, have to be taken into account during construction. In the same way, basic conditions like size and installation location add up to considerable requirements regarding safety and control technique.

PVC High Speed Door,Large PVC High Speed Door,Transparent High Speed Door,Great Performance High Speed Door

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