Researchers found that adding small molecules derived from lignin and humus can significantly increase the conversion of crop straw into stable soil organic matter. This process is especially effective in sodic soils, where high sodium levels usually hinder microbial activity and carbon storage. The study shows that these organic molecules improve microbial diversity and strengthen the interactions between decomposers and predators. This results in higher levels of mineral-associated organic matter, which is a more permanent form of carbon storage in agricultural land.
