Urea is a commonly used synthetic fertilizer composed mainly of urea molecules with the chemical formula CO(NH2)2. Ordinary urea is a high-concentration nitrogen fertilizer with a nitrogen content typically around 46%, which provides the necessary nitrogen element for plant growth.

Humic acid urea is a compound fertilizer that mixes humic acid and urea to comprehensively regulate soil and plant growth. Specifically, humic acid can improve the physical and chemical properties of soil, enhance soil water retention, permeability, and fertility retention, promote root development and plant uptake capacity; urea can provide nitrogen elements for plants, promote plant growth and development.

Slow-release urea is a special type of urea fertilizer that gradually releases nitrogen into the soil through a slow-release technology, allowing plants to continuously absorb nutrients throughout the growing season.

polypeptide urea is a biological fertilizer, which is composed of a variety of amino acids and urea. Different from traditional fertilizers, polypeptide urea contains a variety of trace elements and organic substances required by plants, and has high nutritional value and plant availability.

Ammonium chloride is an inorganic compound, which is a white crystalline substance that is easily soluble in water and has a bitter taste. Ammonium chloride can be produced by reacting ammonia gas with hydrogen chloride. It is widely used in laboratories and industries to prepare other chemicals.

Ammonium sulfate is an inorganic compound that appears as a white crystal or powder and is easily soluble in water. It is commonly used as a fertilizer and industrial raw material, providing a source of nitrogen and sulfur in agriculture to promote crop growth. Additionally, ammonium sulfate is used as a dye and preservative in industries such as textiles, leather, and wood.

Urea ammonium nitrate solution (also known as UAN) is a commonly used nitrogen fertilizer, which is a solution formed by mixing urea and ammonium nitrate in a certain proportion. Urea ammonium nitrate solution typically contains 28% to 32% nitrogen, most of which is urea nitrogen, and a small amount is ammonium nitrate nitrogen. This fertilizer has a rapid and efficient effect, can quickly meet the plant's demand for nitrogen, and promote plant growth and development.