Assessing the Economic and Ecological Outcomes of Sustainable Farming Techniques in Bulgaria
Daniel Petrov

, Anton Mitov

Abstract: The objective of this study is to assess the adoption and effectiveness of sustainable agricultural practices among Bulgarian farms, and to evaluate their economic and ecological performance through both quantitative survey data and a detailed case study. Based on responses from 96 farms across Bulgaria’s six NUTS–2 regions, the study identifies precision agriculture, inhibited nitrogen fertilization, and organic farming, as the most widely implemented sustainable practices. The survey results shows that precision agriculture is adopted by 42% of farms and rated highest in economic efficiency, while inhibited fertilization (35%) demonstrates strong nitrogen-use efficiency (NUE) and profitability. Although less prevalent (16%), cover crops are highly valued for their positive impact on soil health and long-term sustainability.
A case study of a 116-hectare farm in southeastern Bulgaria further validates these findings. The combined application of inhibited fertilization, precision input management and cover cropping, led to a 7.2% increase in yields, a 9 – 12% reduction in input costs, and a 15 – 23% improvement in profitability. Ecologically, the practice contributed to an increase in soil organic matter by over 0.3%, enhanced water retention, and natural nitrogen fixation.
The results underscore the potential of sustainable practices not only to improve farm-level efficiency, but also to support broader agroecological resilience. However, systemic barriers, such as limited funding access and technical capacity, must be addressed. This research highlights the need for strategic policy support and institutional alignment to facilitate an effective transition to sustainable agriculture in line with the European Green Deal.
Keywords: agroecological transition; cover crops; nitrogen efficiency; precision farming; sustainable agriculture
Citation: Petrov, D., Mitov, A. (2025). Assessing the Economic and Ecological Outcomes of Sustainable Farming Techniques in Bulgaria. Bulgarian Journal of Agricultural Economics and Management, 70(2), 28-43.
References: (click to open/close) | Adger, W. N., Agrawala, S., Mirza, M. M. Q., Conde, C., O’Brien, K., Pulhin, J., Pulwarty, R., Smit, B., & Takahashi, K. (2007). Assessment of adaptation practices, options, constraints and capacity. In: Parry, M. L. (Ed.). (2007). Climate change 2007-impacts, adaptation and vulnerability: Working group II contribution to the fourth assessment report of the IPCC (Vol. 4). Cambridge University Press. Altieri, M. A. (1989). Agroecology: A new research and development paradigm for world agriculture. Agriculture, Ecosystems & Environment, 27(1-4), 37-46. https://doi.org/10.1016/0167-8809(89)90070-4 Basche, A. D., & DeLonge, M. S. (2019). Comparing infiltration rates in soils managed with conventional and alternative farming methods: A meta-analysis. PloS one, 14(9), e0215702. Baudry, J., Bunce, R. G. H., & Burel, F. (2000). Hedgerows: an international perspective on their origin, function and management. Journal of environmental management, 60(1), 7-22. https://doi.org/10.1006/jema.2000.0358 Brooks, N., Adger, W. N., & Kelly, P. M. (2005). The determinants of vulnerability and adaptive capacity at the national level and the implications for adaptation. Global environmental change, 15(2), 151-163. https://doi.org/10.1016/j.gloenvcha.2004.12.006 Cassimiro, J. B., de Oliveira, C. L. B., Boni, A. D. S., Donato, N. D. L., Meirelles, G. C., da Silva, J. F., ... & Heinrichs, R. (2023). Ammonia volatilization and marandu grass production in response to enhanced-efficiency nitrogen fertilizers. Agronomy, 13(3), 837. https://doi.org/10.3390/agronomy13030837 Coase, R. H. (1960). The problem of social cost. Journal of Law and Economics, 3, 1-44. https://doi.org/10.1086/466560 Costanza, R., d'Arge, R., de Groot, R., Farber, S., Grasso, M., Hannon, B., Limburg, K., Naeem, S., O'Neill, R. V., Paruelo, J., Raskin, R. G., Sutton, P., & van den Belt, M. (1997). The value of the world's ecosystem services and natural capital. Nature, 387(6630), 253–260. https://doi.org/10.1038/387253a0 Derpsch, R., Friedrich, T., Kassam, A., & Li, H. (2010). Current status of adoption of no-till farming in the world and some of its main benefits. International journal of agricultural and biological engineering, 3(1), 1-25. https://doi.org/10.3965/j.issn.1934-6344.2010.01.001-025 Drinkwater, L. E., Letourneau, D. K., Workneh, F. A. H. C., Van Bruggen, A. H. C., & Shennan, C. (1995). Fundamental differences between conventional and organic tomato agroecosystems in California. Ecological applications, 5(4), 1098-1112. Effland, A. (2019). The United States Department of Agriculture, 1900–1945. In Oxford Research Encyclopedia of American History. Retrieved 27 Mar. 2025, from https://oxfordre.com/americanhistory/view/10.1093/acrefore/9780199329175.001.0001/acrefore-9780199329175-e-509 Foley, J. A., Ramankutty, N., Brauman, K. A., Cassidy, E. S., Gerber, J. S., Johnston, M., Mueller, N. D., O'Connell, C., Ray, D. K., West, P. C., Balzer, C., Bennett, E. M., Carpenter, S. R., Hill, J., Monfreda, C., Polasky, S., Rockström, J., Sheehan, J., Siebert, S., ... Zaks, D. P. M. (2011). Solutions for a cultivated planet. Nature, 478(7369), 337–342. https://doi.org/10.1038/nature10452 Herridge, D. F., Peoples, M. B., & Boddey, R. M. (2008). Global inputs of biological nitrogen fixation in agricultural systems. Plant and soil, 311, 1-18. https://doi.org/10.1007/s11104-008-9668-3 Hoeschle, L., Maruejols, L., & Yu, X. (2025). The impact of energy justice on local economic outcomes: Evidence from the bioenergy village program in Germany. Energy Economics, 145(C). Howden, S. M., Soussana, J.-F., Tubiello, F. N., Chhetri, N., Dunlop, M., & Meinke, H. (2007). Adapting agriculture to climate change. Proceedings of the National Academy of Sciences of the United States of America, 104(50), 19691-19696. Jarvis, D. I., Hodgkin, T., Sthapit, B. R., Fadda, C., & Lopez-Noriega, I. (2011). An heuristic framework for identifying multiple ways of supporting the conservation and use of traditional crop varieties within the agricultural production system. Critical Reviews in Plant Sciences, 30(1-2), 125-176. https://doi.org/10.1080/07352689.2011.554358 Koudahe, K., Allen, S. C., & Djaman, K. (2022). Critical review of the impact of cover crops on soil properties. International Soil and Water Conservation Research, 10(3), 343-354. https://doi.org/10.1016/j.iswcr.2022.03.003 Lal, R. (2014). Sustainable intensification for adaptation and mitigation of climate change and advancement of food security in Africa. In Sustainable intensification to advance food security and enhance climate resilience in Africa (pp. 3-17). Cham: Springer International Publishing. http://dx.doi.org/10.1007/978-3-319-09360-4_1 Lang, M. (2006). Globalization and its history. The Journal of Modern History, 78(4), 899-931. https://doi.org/10.1086/511251 Lei, B., Wang, J., & Yao, H. (2022). Ecological and environmental benefits of planting green manure in paddy fields. Agriculture, 12(2), 223. https://doi.org/10.3390/agriculture12020223 Li, Y., Herzog, F., Levers, C., Mohr, F., Verburg, P. H., Bürgi, M., ... & Williams, T. G. (2024). Agricultural technology as a driver of sustainable intensification: insights from the diffusion and focus of patents. Agronomy for Sustainable Development, 44(2), 14. https://doi.org/10.1007/s13593-024-00949-5 Lowenberg‐DeBoer, J., & Erickson, B. (2019). Setting the record straight on precision agriculture adoption. Agronomy journal, 111(4), 1552-1569. https://doi.org/10.2134/agronj2018.12.0779 Malthus, T. (1798). An essay on the principle of population. London: Oxford University Press. Mancinelli, R., Marinari, S., Brunetti, P., Radicetti, E., & Campiglia, E. (2015). Organic mulching, irrigation and fertilization affect soil CO2 emission and C storage in tomato crop in the Mediterranean environment. Soil and Tillage Research, 152, 39-51. https://doi.org/10.1016/j.still.2015.04.001 Mitsch, W. J., & Gosselink, J. G. (2015). Wetlands (5th ed.). John Wiley & Sons. Patel, R. (2012). The Long Green Revolution. The Journal of Peasant Studies, 40(1), 1-63. https://doi.org/10.1080/03066150.2012.719224 Pecenka, J. R., Ingwell, L. L., Foster, R. E., Krupke, C. H., & Kaplan, I. (2021). IPM reduces insecticide applications by 95% while maintaining or enhancing crop yields through wild pollinator conservation. Proceedings of the National Academy of Sciences, 118(44), e2108429118. Pigou, A. C. (1920). The Economics of Welfare. London: Macmillan and Co. https://oll.libertyfund.org/titles/pigou-the-economics-of-welfare Pittelkow, C. M., Liang, X., Linquist, B. A., Van Groenigen, K. J., Lee, J., Lundy, M. E., ... & Van Kessel, C. (2015). Productivity limits and potentials of the principles of conservation agriculture. Nature, 517(7534), 365-368. https://doi.org/10.1038/nature13809 Reganold, J. P., & Wachter, J. M. (2016). Organic agriculture in the twenty-first century. Nature plants, 2(2), 1-8. https://doi.org/10.1038/nplants.2015.221 Sadollah, A., Nasir, M., & Geem, Z. W. (2020). Sustainability and optimization: From conceptual fundamentals to applications. Sustainability, 12(5), 2027. https://doi.org/10.3390/su12052027 Sial, J., Mahmood, S., Kılıç, Z., Saeed, M., Iqbal, M., & Rehman, H. (2022). Water pollution from agriculture and industry. International Journal of Current Engineering and Technology, 12(3), 310-314. https://doi.org/10.14741/ijcet/v.12.3.8 Six, J., Bossuyt, H., Degryze, S., & Denef, K. (2004). A history of research on the link between (micro) aggregates, soil biota, and soil organic matter dynamics. Soil and tillage research, 79(1), 7-31. https://doi.org/10.1016/j.still.2004.03.008 Smit, B., & Wandel, J. (2006). Adaptation, adaptive capacity and vulnerability. Global environmental change, 16(3), 282-292. https://doi.org/10.1016/j.gloenvcha.2006.03.008 Sojka, R. E., Bjorneberg, D. L., & Entry, J. A. (2002). Irrigation: An historical perspective. In R. Lal (Ed.), Encyclopedia of Soil Science (1st ed., pp. 745-749). Marcel Dekker. Soto-Gómez, D., & Pérez-Rodríguez, P. (2022). Sustainable agriculture through perennial grains: Wheat, rice, maize, and other species. A review. Agriculture, Ecosystems & Environment, 325, 107747. Tisdall, J. M., & Oades, J. M. (1982). Organic matter and water-stable aggregates in soils. Journal of Soil Science, 33(2), 141–163. https://doi.org/10.1111/j.1365-2389.1982.tb01755.x Tsur, Y., & Zemel, A. (2005). Scarcity, growth, R&D. Journal of Environmental Economics, and Management, 49(3), 484-499. https://doi.org/10.1016/j.jeem.2004.09.005 Von Bertalanffy, L. (1968). General System Theory: Foundations, Development. New York: George Braziller. Von Carlowitz, H. C. (1713). Sylvicultura oeconomica, oder haußwirthliche Nachricht und naturmäßige Anweisung zur wilden Baum-Zucht. Leipzig: Braun. Wang, H., Zhang, L., Dawes, W. R., & Liu, C. (2001). Improving water use efficiency of irrigated crops in the North China Plain – measurements and modelling. Agricultural water management, 48(2), 151-167. https://doi.org/10.1016/S0378-3774(00)00118-9 West, T. O., & Post, W. M. (2002). Soil organic carbon sequestration rates by tillage and crop rotation: a global data analysis. Soil Science Society of America Journal, 66(6), 1930-1946. http://dx.doi.org/10.2136/sssaj2002.1930 Wischmeier, W. H., & Smith, D. D. (1978). Predicting rainfall erosion losses: A guide to conservation planning (USDA Agricultural Handbook No. 537). U.S. Department of Agriculture. Wolfert, S. (2011). Developments on precision agriculture and information management in The Netherlands and Europe. In Proceedings of the 8th European Conference on Precision Agriculture (pp. 509-519). ECPA. Wunder, S. (2015). Revisiting the concept of payments for environmental services. Ecological economics, 117, 234-243. https://doi.org/10.1016/j.ecolecon.2014.08.01 Zhang, Y., Ye, C., Su, Y., Peng, W., Lu, R., Liu, Y., ... & Zhu, S. (2022). Soil Acidification caused by excessive application of nitrogen fertilizer aggravates soil-borne diseases: Evidence from literature review and field trials. Agriculture, ecosystems & environment, 340, 108176. https://doi.org/10.1016/j.agee.2022.108176 CIFOR-ICRAF. (2021). Harnessing the power of forests, trees and agroforestry: Annual report 2021. Center for International Forestry Research and World Agroforestry. https://www.cgiar.org/research/publication/cifor-icraf-annual-report-2021-harnessing-the-power-of-forests-trees-and-agroforestry/ European Commission. (n.d.). The European Green Deal. https://commission.europa.eu/strategy-and-policy/priorities-2019-2024/european-green-deal_en European Environment Agency. (2019). Trends and projections in Europe 2019: Tracking progress towards Europe's climate and energy targets. https://www.eea.europa.eu/en/analysis/publications/trends-and-projections-in-europe-1 European Environment Agency. (2021). Urban sustainability in Europe: Learning from nexus analysis (EEA Report No 07/2021). https://www.eea.europa.eu/publications/urban-sustainability-in-europe-learning Intergovernmental Panel on Climate Change (IPCC). (2007). Chapter 8: Agriculture (B. Metz, O. R. Davidson, P. R. Bosch, R. Dave, & L. A. Meyer, Eds.), Climate Change 2007: Mitigation of Climate Change. Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. Cambridge University Press. https://www.ipcc.ch/site/assets/uploads/2018/02/ar4-wg3-chapter8-1.pdf OECD. (2018). Rural policy reviews: Rural 3.0 – A framework for rural development. OECD Publishing. https://doi.org/10.1787/25227075 The Brundtland Report “Our Common Future” (WCED, 1987) brought the concept of sustainable development into the mainstream of business and political thought. United Nations Framework Convention on Climate Change. (2015). Paris Agreement. UN Doc. FCCC/CP/2015/10/Add.1. https://unfccc.int/sites/default/files/english_paris_agreement.pdf United Nations. (1997). Kyoto Protocol to the United Nations Framework Convention on Climate Change. https://unfccc.int/sites/default/files/resource/docs/cop3/l07a01.pdf
|
|
| Date published: 2025-06-30
Download full text