Land application is a process where organic materials, such as biosolids or manure, are spread on soil to improve its quality and fertility. This method helps recycle nutrients back into the land, promoting healthy plant growth and reducing the need for chemical fertilizers. The application can be done through various techniques, including surface spreading or injection into the soil. Proper management and monitoring are essential to ensure that the application is safe and effective, minimizing any potential environmental impacts while maximizing agricultural benefits.