Potential Benefits and Risks of Organic Amendments to Soil Health

Dear Colleagues,

The transition to sustainable production systems requires a change in the production model from linear to circular. In this way, waste and by-products are integrated into the system, reducing the impact on the environment. In view of circular economy, the reuse of organic waste as soil amendments represents a valid, economically advantageous alternative. Organic amendments (such as compost, sewage, crop residues, digestates from the anaerobic treatment of waste or biosolids) have been historically used in agricultural management as they represent one of the main sources of nutrients for plants. The application of amendments with different properties and agronomic potential guarantees the supply of macro- and micronutrients, necessary to not only increase crop productivity but also to restore soil health. It is also known that this practice, widespread among farmers, affects not only the diversity and microbial composition of soil, but also its growth by providing energy and essential nutrients. Even physical properties of the soil can be positively influenced by the application of the amendment. The incorporation of organic material into soil improves its structure and water holding capacity. On the other hand, the application of biomasses can be dangerous for human, animal and plant health. This practice causes concern because it can expose the environment to various risks derived from the presence of pollutants of different types such as heavy metals, microplastics, potential human pathogens and emerging contaminants (such as pesticides and pharmaceuticals), which can easily enter the soil–plant system. In addition, the overuse of low-quality organic amendments can lead to excess nutrients (e.g., phosphorus, nitrogen), groundwater contamination, greenhouse gas emissions and soil acidification or salinization. Nowadays, the scientific community is increasingly engaged in studying effective strategies to mitigate the risks associated with the application of organic soil amendments. This Special Issue welcomes manuscripts aiming to share any new knowledge related to the management of organic amendments in agriculture and its effect on soil health and crop productivity and quality.

Prof. Gennaro Gennaro Brunetti
Dr. Francesco De Mastro
Guest Editors

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• soil fertility
• waste management
• nutrient management
• soil chemistry
• fertilizers
• organic matter
• environmental science
• contaminants of emerging concern
• soil pollutions
• tillage and organic management