Assessing the Therapeutic Effects of Soil Amendments
Posted August 2025
Researchers: Davie Kadyampakeni
Contact: Davie Kadyampakeni, UF/IFAS CREC dkadyampakeni@ufl.edu
Summary:
Huanglongbing (HLB) poses a critical threat to citrus production in the United States by impairing root function, reducing fruit yields, resulting in tree decline. Current management strategies rely on unsustainable synthetic fertilizers and chemical inputs, contributing to soil degradation, reduced microbial diversity, and escalating production costs. This project proposes soil-centered, ecological strategies utilizing organic amendments and beneficial microbes to improve soil health, root development, and fruit productivity in citrus production systems impacted by huanglongbing. The project is being conducted at four commercial citrus sites (four in Florida and two in Texas) using a randomized complete block design testing five treatments combining organic amendments and beneficial microbes. We are evaluating critical components: soil health indicators measuring physical, chemical, and biological indicators; root density and distribution; and fruit yield, quality, and drop rates. Beneficial microbes are applied with organic amendments to enhance nutrient cycling and microbial activity, promoting root development and root-soil interactions. This project addresses critical knowledge gaps on the role of microbial and organic-based practices in rehabilitating citrus groves affected by HLB. Focusing on the soil-plant interface, the project seeks to improve nutrient and water effciency and enhance environmental resilience. Grower collaboration through the six on-farm trials, outreach, and knowledge-sharing is emphasized to support the widespread adoption of sustainable practices. Results will be disseminated through grower meetings, fact sheets, grower workshops, and conferences. This project aligns with sustainable agriculture principles, supporting productivity, environmental stewardship, and the long-term viability of citrus production systems.
Take Home Message:
- The project is evaluating the impact of various organic amendments and beneficial microbes on nutrient cycling and fruit yield.
- The results are expected to improve root and soil health and long-term and sustainable citrus production.
- Environmental quality is also expected to improve due to use of soil amendments and reduced use of synthetic fertilizers.
