Classification and Characteristics of Coal and Its Applications in Agricultural Production

Coal is a combustible mineral formed from the remains of ancient plants through long geological processes. Its main component is carbon, and it also contains elements such as hydrogen, oxygen, nitrogen and sulfur. It is an important basic energy source in China and occupies an important position in both industrial production and daily life.

According to the degree of coalification, coal can generally be divided into categories such as peat, lignite, bituminous coal and anthracite. Peat and lignite have a lower degree of coalification, are loose in texture and have a relatively high moisture content; bituminous coal and anthracite have a deep degree of coalification, a high carbon content and a high calorific value, and burn more completely.

In agricultural production, coal has relatively wide uses. In northern regions, greenhouses, seedling nurseries and agricultural product drying often use coal as fuel for heating and heat supply, and household energy in some rural areas also cannot do without coal. In addition, lignite and weathered coal are rich in humic acid and are important raw materials for producing humic acid fertilizers. Such fertilizers are widely used in improving soil and promoting crop growth.

It should be noted that coal combustion produces soot and harmful gases. When using it, qualified coal types should be selected, and ventilation and smoke exhaust should be maintained to avoid affecting crops in greenhouses and human health. With the promotion of clean energy, the way coal is used in agricultural production is also gradually developing in a cleaner and more efficient direction.