Abstract
The modern agricultural practices intensively use agrochemicals to increase crop yield resulting into hike in cost of farming. Fertilizers are one of the major agrochemicals used to boost crop yield. However, a significant amount of applied chemical fertilizers in the fields is lost due to various abiotic and biotic factors including photolysis, volatilization, leaching, hydrolysis and microbial immobilization. These factors reduce the nutrient use efficiency (NUE) and increase the frequency of fertilizer application. Current agricultural practices are ineffective at concurrently boosting nutrient use efficiency and agriculture productivity. The losses of fertilizers at ground level may be minimized by controlling the nutrient release kinetics through anchoring the nutrient with an appropriate porous carrier material.
Slow-release fertilizers (SRFs) smartly deliver nutrients to the plants at a relatively slow rate for better synchronization of nutrient requirements during plant growth with minimal harm to the environment. Nanobiochar (N-BC)-based slow-release fertilizer is an effective, economic, robust, and environment friendly approach to improve nutrient use efficiency (NUE) of plant. Neat N-BC has also been used as a carrier for targeted delivery of agrochemicals in a few studies; the same opens a research opportunity to be taken up in the offing. Hence, N-BC can play a vital role in sustainable agriculture practices. This chapter gives an overview of synthesis, characteristics and characterization of biochar-based nanoformulation for agricultural applications including sustained release of agrochemicals. Aspects such as the effect of biochar-based nanoformulation on soil health (heavy metal and agrochemicals immobilization), plant growth and yield improvement have been included in the discussion.
Future studies may focus on the development of novel, efficient, economical, robust, viable, and eco-friendly smart N-BC based fertilizers.
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Sheokand, M. et al. (2023). Nanobiochar-Based Formulations for Sustained Release of Agrochemicals in Precision Agriculture Practices. In: Shanker, U., Hussain, C.M., Rani, M. (eds) Handbook of Green and Sustainable Nanotechnology. Springer, Cham. https://doi.org/10.1007/978-3-030-69023-6_109-1
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