Academic, Cambridge, MA, pp 279–298. Chitosan has a number of commercial and possible biomedical uses. Chitosan is considered environmental friendly for agricultural uses as it is easily degradable and non-toxic to humans. Parts Per Million for Agricultural Use. 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. The antimicrobial activities exhibited by chitosan depends on several factors. Chitin and chitosan also have potential in agriculture with regard to controlling plant diseases. Velásquez CL, Pirela MR (2016) Chapter 10: Biochemical aspects of the chitin fungicidal activity in agricultural uses. Chitosan is a versatile biopolymer with unique properties. Application can be done by different ways : in the seed, in the soil or by foliar spraying. Chitosan shares a number of biochemical similarities with the cellulose found in plant cell walls. Agricultural Uses of Chitosan Chitosan has a number of commercial and possible biomedical uses. In common with cellulose, it is a long-chained … It is the development direction of green agricultural production in the future. It can be used in agriculture as a seed treatment and biopesticide, helping plants to fight off fungal infections. 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. Chitosan oligosaccharide changes soil flora and promotes beneficial microorganism growth. It is called the third generation of biotechnology. Chitosan is a linear polysaccharide composed of randomly distributed β-(1→4)-linked D-glucosamine and N-acetyl-D-glucosamine. 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. In agriculture, chitosan is typically used as a natural seed treatment and plant growth enhancer, and as an ecologically Application of chitosan oligosaccharide in agriculture. It is nontoxic, biodegradable and biocompatible. 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. In: Bautista-Baños S, Romanazzi G, Jiménez-Aparicio A (eds) Chitosan in the preservation of agricultural commodities. 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 has a number of commercial and possible biomedical uses. Chitosan oligosaccharide can be widely used in agriculture, food, chemical industry, energy, environmental protection, medicine and other fields. They are active against soil fungi, viruses, bacteria, and other pests. The biological related properties of chitosan make it particularly suitable for applications related with agricultural, food, and environmental engineering uses. There are 400+ established applications for chitosan in industries such as water treatment, textiles, agriculture, food processing, and many more. 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). This chapter explores the relationship between the chemical characteristics of chitosan with its main functional properties. 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