The agricultural technique that involves using ashes to fertilize the soil is known as biochar amendment. This practice uses organic materials that have been burned at high temperatures with limited oxygen to produce a charcoal-like substance that enhances soil fertility.
Ashes, particularly from wood and certain types of plant materials, are rich in potassium, calcium, and magnesium, which are essential nutrients for plant growth. By incorporating ashes into the soil, farmers can improve its nutrient content, pH balance, and overall health.
This method not only provides immediate nutrients to the soil but also helps improve its structure, leading to better water retention and aeration. Additionally, it can aid in reducing soil acidity, making it more favorable for many crops.
In summary, using ashes as a soil amendment is a simple yet effective technique that harnesses natural processes to enhance agricultural productivity.