Why do farmers use ammonium nitrate in fertilisers?

Farmers use ammonium nitrate in fertilisers because it provides essential nitrogen nutrients that promote plant growth.

Ammonium nitrate is a popular choice for fertilisers due to its high nitrogen content. Nitrogen is a vital nutrient for plants as it is a key component of amino acids, proteins, and nucleic acids, all of which are essential for plant growth and development. When ammonium nitrate is applied to soil, it breaks down into its constituent parts - ammonium and nitrate, both forms of nitrogen that can be readily absorbed by plants.

The process of nitrogen absorption by plants is quite straightforward. The ammonium ions are taken up directly by the plant roots. On the other hand, the nitrate ions are first converted into ammonium ions by bacteria present in the soil, a process known as nitrification. These ammonium ions are then absorbed by the plant roots. This dual source of nitrogen makes ammonium nitrate a highly efficient fertiliser.

Moreover, ammonium nitrate is water-soluble, meaning it can easily dissolve in water. This property allows it to be quickly absorbed by the soil, making the nitrogen immediately available to the plants. It also means that ammonium nitrate can be applied in a variety of ways, such as through irrigation water or directly onto the soil, providing flexibility for the farmer.

However, it's important to note that while ammonium nitrate is highly beneficial for plant growth, it must be used responsibly. Overuse can lead to excessive nitrogen in the soil, which can harm the environment by causing water pollution and contributing to greenhouse gas emissions. Therefore, farmers must carefully manage their use of ammonium nitrate to ensure sustainable farming practices.