Himanshu Tiwari

The dynamics of soil organic carbon and microbial activity in organically managed soils play a crucial role in mitigating greenhouse gas (GHG) emissions through processes such as carbon sequestration and the stabilization of organic matter. Organic farming, through the application of compost, manure, cover crops, and reduced use of synthetic chemicals, promotes biological activity in the soil and increases soil organic carbon content. Active soil microorganisms break down organic residues and facilitate the formation of stable humic substances that can store carbon in the soil over the long term. Additionally, a healthy microbial environment can contribute to reduced nitrous oxide (N₂O) emissions by enhancing nitrogen cycling efficiency and decreasing the need for external fertilizers.

Quantifying these mechanisms requires precise methods, such as measuring stable and labile carbon fractions, gas chromatography to monitor GHG emissions, and molecular techniques for analyzing microbial diversity and function (e.g., metagenomics). Optimization of these processes involves tailored agroecological practices such as crop rotations with legumes, minimal tillage, and continuous organic matter inputs, combined with long-term monitoring of soil quality changes. In this way, organically managed soils can become significant carbon sinks and contribute meaningfully to long-term climate change mitigation.

Himanshu Tiwari

In organically managed soils, soil organic carbon dynamics and microbial activity play a crucial role in mitigating greenhouse gas emissions by enhancing carbon sequestration and reducing the release of other gases like methane and nitrous oxide. By promoting soil organic carbon accumulation and microbial activity, organic farming practices can help reduce the net emission of greenhouse gases and contribute to climate change mitigation.

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