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Humic substances (humic and fulvic acids) are widespread, being present in soil, water, lake sediments, peat, and different coal. Therefore, there is a great interest for their immense role in terrestrial and aquatic systems, as well as their bio-stimulatory effects on plant growth. Humic substances, through their positive effects on plant nutrition and by increasing the tolerance to abiotic and biotic stress, lead to higher yields and superior quality crops. Their role in agriculture is essential, but humic subst...

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...