The Journal of Sustainable Agriculture and Environment recently published research by authors Anna Agosti, Valeria Gianguzzi, Samreen Nazeer, Estella Rao, Alfio Daniele Romano, Martina Papa, Benedetta Chiancone, Valeria Guarrasi, Angela Paterna, Nicolina Timpanaro, and Margherita Amenta regarding the impact of biochar and wood distillate on cherry tomato production. This study highlights a major advancement in greenhouse farming by demonstrating how waste by-products from the circular economy can drastically improve crop performance. By partially replacing traditional, non-renewable growing substrates with biochar and supplementing plants with wood distillate, the researchers identified a powerful method for boosting both the quantity and the physical durability of tomato fruits.

The most striking result of the research was the massive increase in plant productivity. When plants were grown in a substrate containing 2% biochar and treated with wood distillate, the total fruit yield increased by 67% compared to plants grown under standard conditions. This synergy between the two treatments also led to a higher total number of fruits produced per plant, especially when higher concentrations of biochar were used. These findings suggest that the specific combination of biochar’s structural support in the root zone and the biostimulant properties of wood distillate creates a highly favorable environment for high-intensity tomato cultivation.

Beyond yield, the physical strength of the fruit is a critical factor for reducing post-harvest waste, as tomatoes are often damaged during transportation. The study used advanced mechanical compression tests to find that biochar application significantly improved fruit firmness. Specifically, tomatoes grown with 4% biochar showed a 42% increase in initial firmness compared to the control group. This increase in tissue stiffness means the fruits are better equipped to resist bruising and mechanical failure. While wood distillate tended to make the fruits slightly softer and more elastic, the presence of biochar helped balance these effects, resulting in a robust fruit that maintains its structural integrity.

The study also tracked the quality of the tomatoes across several harvest dates, discovering that the timing of the harvest influenced how the treatments worked. During the first harvest of the season, wood distillate on its own was particularly effective at increasing individual fruit weight, resulting in tomatoes that were on average 23% heavier than those from untreated plants. This early boost was also reflected in the juice yield, which saw a 26% increase in fruits treated with wood distillate. These benefits are highly relevant for the industrial processing sector, where high juice yields directly translate to higher economic value and production efficiency for products like tomato sauce.

Maintaining the aesthetic quality of the fruit is essential for consumer acceptance, and the research confirmed that these sustainable practices do not negatively impact the appearance of the tomatoes. There were no significant differences observed in the red-green color intensity across any of the treatments throughout the entire harvest period. Furthermore, the lightness and yellow-blue color values remained stable, particularly in plants receiving both biochar and wood distillate. This ensures that farmers can adopt these environmentally friendly methods without worrying about producing fruit that looks different from traditional greenhouse varieties.

The environmental significance of this work is substantial. Standard soilless cultivation often relies on perlite, which is a non-renewable resource that requires high amounts of energy to process. By replacing a portion of this material with biochar—a carbon-rich substance made from agricultural waste—the industry can move toward a more sustainable and circular production model. Wood distillate is also a natural by-product of biochar production, meaning these two materials can be produced together to form a low-waste agricultural system.

In conclusion, the research demonstrates that the strategic use of biochar and wood distillate offers a promising pathway for modern agriculture. The ability to increase yields by 67% while simultaneously making the fruit firmer and more resistant to damage addresses two of the most significant challenges in tomato production: increasing productivity and reducing post-harvest food loss. While further work is needed to fine-tune the exact timing of wood distillate applications, this study provides a strong scientific foundation for integrating renewable carbon materials into high-value food systems.

Source: Agosti, A., Gianguzzi, V., Nazeer, S., Rao, E., Romano, A. D., Papa, M., Chiancone, B., Guarrasi, V., Paterna, A., Timpanaro, N., & Amenta, M. (2026). Sustainable substrate management in soilless tomato cultivation: Combined effects of biochar and wood distillate on plant growth and fruit mechanical properties. Journal of Sustainable Agriculture and Environment, 5, e70144.