List the fertilizers that increase the acidity of the soil

Soil is the place that provides nutrients for plants. Soil acidity is one of the factors that affect the quality of crops. Deficiency or excess causes plants to grow slowly, roots to be stunted, and plants to achieve low yields. Therefore, farmers choose fertilizers that increase soil acidity to improve this situation.

The role of fertilizers to increase soil acidity

Soil acidity is a very important factor affecting soil chemical properties. Specifically, Aluminum Ion (Al) is the main toxic factor for plants. It has the ability to dissolve pH and cause low soil pH.

Soil acidity is a decisive environmental factor that causes limitations to plant growth. In addition, soil acidity or alkalinity also greatly affects the state of soil nutrients.

In addition, it also affects the soil's ability to provide nutrients and the development of plant roots and affects the effectiveness of fertilization. This is the reason why people need to pay attention to adjusting the pH of the soil before planting.

Fertilizers improve soil acidity

Origin of soil acidity

There are many causes of soil acidity. Mainly due to the following reasons:

– Due to soil structure: Light-textured soils, sloping soils, sandy soils, gravel soils are often easily washed away and become acidic soils.

– Due to the weathering process, which creates the exchange and washing away of alkaline cations.

– Due to the reaction of CO2 in the air with soil solution

(CO2 + H2O ↔ CO32- + 2 H+).

– Plants grow for many years on the soil, absorbing nutrients from the soil such as N, P, K and trace elements such as Calcium, Magnesium, etc. Over time, the soil loses alkaline substances and becomes acidic.

– The decomposition of organic matter in the soil.

– Overuse of chemical fertilizers, pesticides, herbicides, stimulants… after a long time leads to acidic, hard and barren soil

– Over-fertilization with N fertilizers, some mineral fertilizers with acid bases such as Ammonium Sulfate (SA), Potassium Chloride (KCl), Potassium Sulfate (K2SO4), Superphosphate on the surface. This causes the formation of a very low pH area on the ground because NH4+ is oxidized to NO3- by microorganisms, reducing pH, or dissolving Ca, Mg, and washing away substances.

– In addition, acid rain is also a factor that increases soil acidification.

The origin of soil acidity

Fertilizers that increase soil acidity

Currently, there are many types of fertilizers on the market that have the function of improving soil acidity. You need to learn carefully to avoid making the soil worse. Below are some types of fertilizers used to help improve soil acidity.

1. Phosphate fertilizer

In addition to providing nutrients for plants, phosphate fertilizer is also very effective in detoxifying alum. Therefore, you can fertilize or use superphosphate to fertilize plants. In addition to the above fertilization methods, you can combine spraying foliar fertilizers containing phosphorus to improve soil acidity.

Phosphate fertilizer

2. Composted organic fertilizer

This is a very important fertilizer to increase soil acidity. In addition to the effect of improving the soil, making the soil loose, etc., it has the same effect as phosphate fertilizer. When applied to the soil, it will combine with toxic substances to reduce alum toxicity, reducing toxicity to plants.

3. Lime

This is the type of fertilizer that farmers mainly use. Adding lime to improve the acidity of the soil, raising the pH to a higher level. In particular, lime applied to acidic soil also has the following main benefits:

+) Helps nutrients in the soil to dissolve more easily.

+) Improves soil structure.

+) Provides nutrients such as Ca, Mg for plants.

+) Promotes the growth of beneficial microorganisms.

+) Neutralizes acidity caused by fertilizers.

+) Reduces toxicity affecting plants (heavy metals dissolve strongly at low pH)

Lime powder helps improve soil conditions

Here is a summary of the most commonly used fertilizers that increase soil acidity. Farmers should combine proper use and reasonable fertilizer dosage to improve soil acidity.

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