The researchers studied how combining glycine and inorganic nitrogen affects maize plant growth and nitrogen levels in the soil. They found that using glycine with inorganic nitrogen increased nitrogen uptake in maize plants. This combination also boosted nitrogen metabolism and increased the amount of amino acids and proteins in the leaves. Additionally, using glycine with inorganic nitrogen led to longer roots and more root surface area in maize plants, which helped with nitrogen uptake. Overall, combining glycine with inorganic nitrogen can enhance soil nitrogen content, support maize root growth, and improve nitrogen uptake and metabolism.