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Approaching the issue of fertilizers with organic substances of the bio stimulants class is a difficult task as the concept is far from complete elucidation and the legislation, research and experimental activities are still incipient as this products category with agricultural use is concerned. Any substance or micro organism applied to plants with the purpose to enhance nutrition efficiency, non biotic stress bearing, and/or crops quality features regardless of their nutrient content can be generally defined as ...

Use of fertilizers and plant protection products for yield increases led to environment pollution. There is intense concern for new materials development with controlled immobilization/ holdup/release role of compounds that get involved in plant nutrition and protection. Multiple beneficial effects of humic substances upon soil ecosystem is the reason that their control and conservation take priority. Part of the research results carried out regarding humic substances (HS) holdup on biodegradable, bio polymeric st...