Which is more suitable for agricultural phosphoric acid or agricultural sulfuric acid ? Let’s first get acquainted with these two acids.
All plants need the right balance of minerals and nutrients to grow. Phosphate is one of these substances and is generally present in all fertilizers, whether organic or synthetic. In general, this is done in the form of phosphoric acid, which is a derivative of phosphate.
Phosphoric acid is not directly absorbed by plants, it must first be changed. After soil application, the acid is converted to hydrogen phosphate by chemical and biological agents. It is also converted to dihydrogen phosphate, which can also be used by plants.
It should be noted that there are many primary sources of phosphorus and phosphoric acid. Animal manure contains phosphate, but does not produce new substances. Simply transfers phosphate from one area to another (after fertilizer application). However, by adding acid to the bones of animals, new phosphate can be formed in the form of phosphoric acid.
The same process is used for phosphoric rocks, which have become the main source of phosphorus in commercial fertilizers. The acid is applied to the rock after extraction and crushing, so phosphoric acid is formed that can be used in a variety of ways.
Agricultural phosphoric acid is suitable for feeding crops for greenhouse crops, open field crops and fruit trees and is one of the 17 nutrients that are essential for plant growth and development.
Sulfuric acid is a strong mineral acid composed of hydrogen, oxygen and sulfur. About half of the world’s sulfuric acid production is spent on fertilizer production. Agricultural sulfuric acid increases the yield of agricultural products.
Which, agricultural phosphoric acid or agricultural sulfuric acid, is suitable for regulating the alkalinity of greenhouse crops?
Acids are a great tool for agricultural producers to better control the alkalinity of irrigation water (mainly bicarbonates and carbonates) and the growth of the pH of the environment, and it will always be for them. After understanding the role of alkalinity, the manufacturer may consider the following practical step to control alkalinity using acids through the injector system.
Acids commonly available from manufacturers include phosphoric, sulfuric, nitric, and citric acids. There are criteria for choosing the right acid for these conditions, including:
Relative safety, neutralizing power, cost and nutrient content.
According to the most effective and widely used acid is sulfuric acid. However, it is one of the most dangerous acids to use. For small amounts of alkali removal, phosphoric acid may be the acid of choice. Nitric acid is theoretically ideal because it adds nitrogen to nitrate. But it evaporates and is very oxidizing, making it very difficult to work with. Citric acid is a weak and solid organic acid that makes it safer than the other three acids. But it is much less effective.
Does the use of sulfuric acid and phosphoric acid in very alkaline soils (pH> 8) really help farmers in the reproductive system?
In some parts of the world, grape growers use industrial amounts of hydrogen sulfuric acid and phosphoric acid, claiming that this helps to circumvent the effect of soil pH, basically soil pH in general> 7.5 to 8.5 and structure It is mainly variable, because of this high pH, the effect of chemical fertilizers with fertilization is also very weak.
The oxidation number of sulfur in sulfuric acid is +6, while that in phosphoric acid is +5.
The number of O-H bonds in sulfuric acid is 2, but in phosphoric acid it is 3.
The electronegativity of sulfur is greater than that of phosphorus. The above factors affect the polarity of the O-H bond. The polarity of the O-H bond in sulfuric acid is higher than that of phosphoric acid.
Sulfuric acid is considered a strong acid and is actually the strongest acid. Phosphoric acid is a weak acid.