Sulfur, represented by the formula S₈, is a non-metallic chemical element that naturally occurs in various forms and is essential for many chemical reactions and industrial processes.

Iron sulfate is a chemical compound in the form of a pale green to blue-green crystalline solid. 

Lime appears as a white crystalline powder or granules. It is odorless, mildly caustic, and soluble in water, where it forms an alkaline solution known as limewater.

Fulvic acid is a naturally occurring organic compound, primarily extracted from soil humates, and is a part of the humic acid family. It typically appears as a brown to black powder (depending on the source) and is generally odorless.

Leonardite is a naturally occurring organic material, primarily composed of humus, lignite, and other fossil organic matter. It typically presents as a fine brown to black powder, with a faint odor, and is insoluble in water

Humic Acid appears as a brown to black powder, odorless, and slightly soluble in water under certain conditions. It is primarily extracted from lignite, peat, or organic-rich soils. While weakly soluble in water, it easily dissolves in alkaline solutions. 

Biochar is a solid material, typically in the form of black or dark gray powder, derived from the pyrolysis of organic biomass under controlled low-oxygen conditions.

Peat appears as a brown or black, often moist, organic material formed under low-oxygen conditions. It is a natural substance composed of partially decomposed plant debris.