It is called the third generation of biotechnology. Chitin and chitosan also have potential in agriculture with regard to controlling plant diseases. Chitosan is a versatile biopolymer with unique properties. Chitosan shares a number of biochemical similarities with the cellulose found in plant cell walls. In: Bautista-Baños S, Romanazzi G, Jiménez-Aparicio A (eds) Chitosan in the preservation of agricultural commodities. Chitosan oligosaccharide changes soil flora and promotes beneficial microorganism growth. In agriculture, chitosan is typically used as a natural seed treatment and plant growth enhancer, and as an ecologically It is the development direction of green agricultural production in the future. Application can be done by different ways : in the seed, in the soil or by foliar spraying. Velásquez CL, Pirela MR (2016) Chapter 10: Biochemical aspects of the chitin fungicidal activity in agricultural uses. Agricultural Uses of Chitosan Chitosan has a number of commercial and possible biomedical uses. There are 400+ established applications for chitosan in industries such as water treatment, textiles, agriculture, food processing, and many more. Due to its antibacterial and antifugal properties, chitosan is successfully used in plant protection, as elicitor, growth promoter, enhancer of secondary metabolites production, and in soil correction. Chitosan is considered environmental friendly for agricultural uses as it is easily degradable and non-toxic to humans. Application of chitosan oligosaccharide in agriculture. It can be used in agriculture as a seed treatment and biopesticide, helping plants to fight off fungal infections. Chitosan has a number of commercial and possible biomedical uses. It is nontoxic, biodegradable and biocompatible. In winemaking it can be used as a fining agent, also helping to prevent spoilage. Parts Per Million for Agricultural Use. Academic, Cambridge, MA, pp 279–298. These factors include the plant in question, the degree of polymerization, type of chitosan used, chemical composition of the substrate, as well as the environmental factors (Hadrami, Hadrami, Adam, & Daayf, 2010). Chitosan in Agriculture. Depolymerization of chitosan by the use of HNO2 is a homogeneous reaction where the number of glycosidic bonds broken is stoichiometric to the amount of HNO2 used. The antimicrobial activities exhibited by chitosan depends on several factors. Chitosan has a number of commercial and possible biomedical uses. Chitosan is a linear polysaccharide composed of randomly distributed β-(1→4)-linked D-glucosamine and N-acetyl-D-glucosamine. In common with cellulose, it is a long-chained … It can be used in agriculture as a seed treatment and biopesticide, helping plants to fight off fungal infections.In winemaking, it can be used as a fining agent, also helping to prevent spoilage.In industry, it can be used in a self-healing polyurethane paint coating. The biological related properties of chitosan make it particularly suitable for applications related with agricultural, food, and environmental engineering uses. This chapter explores the relationship between the chemical characteristics of chitosan with its main functional properties. Chitosan oligosaccharides product can not only help plants resist disease, but also decompose animal and plant residues and trace metal elements in the soil, thereby transforming them into plant nutrients, enhancing plant immunity and promoting plant health. 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