Types of Chemical Fertilizers
1. Conventional mineral fertilizers
2. Slow release fertilizer
3. Organo Fertilizers
4. Foliar Fertilizers
5. Correcting deficiencies
They are best known and used, especially in agriculture and lawns. They are characterized because they dissolve easily in the soil and therefore plants have these nutrients just throw them out or a few days later.
• Nitrogen fertilizers: urea, nitrate …
Urea (45-0-0), ammonium nitrate (33-0-0), ammonium sulfate, potassium nitrate, calcium nitrate, sodium nitrate (Nitrate from Chile), …
• Phosphoric Fertilizers
Superphosphate, ammonium phosphate, …
• Potassium Fertilizer
Potassium chloride and potassium sulfate.
• binary complexes
Have 2 of one of the macronutrients: Nitrogen, Phosphorus, Potassium. Examples:
35-15-0. Contains 35% Nitrogen and 15% phosphorus.
13-0-44. Contains 13% Nitrogen and 44% Potash. And so: 15-62-0, etc. ..
• ternary complexes
They all three macronutrients: nitrogen, phosphorus and potassium. Examples: 15-15-15, 12/20/1912, 8-24-8, 10/05/1920, 8-8-8 ,….
• Liquid fertilizers and fertigation
The above may come in liquid form instead of granulated for use in fertigation, ie dissolved in irrigation water. Here we include those used for indoor plants.
Are characterized because they dissolve slowly and are releasing nutrients to the roots slowly, over several months. This is achieved by the chemical formulation itself or by coating the balls with a kind of membrane that slowly let out the minerals. They are more expensive than conventional but last longer.
Eg Osmocote Nitrofoska Stabil, Nutricote, etc.
It is a mixture of organic matter with mineral nutrients (nitrogen, potassium, magnesium, manganese, etc.).. Granules normally come. Ideal for a complete fertilization in the basal dressing in all sorts of crops.
Applied by spraying the plant.
The foliar fertilizer is used as an adjunct to basal dressing. It’s very interesting to provide micronutrients: Iron, Manganese, Copper, etc., As stipulated in small amounts and apply directly assimilated in the leaf itself.
5. CORRECTION OF GAPS
Finally, there are fertilizers specially designed to correct any actual lack of an element or several at a time that may occur. For example, if there is a lack of copper, there is a rich product that fixes this item. If the gap is several at the same time there are also products for it. Some, called A + Z, are all trace elements needed by plants and cover any lack of Iron, Manganese, Zinc, Copper, Boron and Molybdenum.
It can be applied foliar in irrigation water or incorporated into the soil. Always follow the instructions given by the manufacturer on the label.
Source: http://articulos.infojardin.com/articulos/Tipos_de_abonos_2.htm
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