Research Soil ScientistUSDA-ARS Northwest Agroecosystem Research Unit
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Melissa LeTourneau is dedicated to advancing knowledge in cropping systems modeling, soil acidification, and soil nutrient dynamics. She earned her Ph.D. in Crop and Soil Sciences from Washington State University, focusing on root-microbe-mineral interactions in wheat rhizospheres. During her post-doctoral research with the USDA-ARS Wheat Health, Genetics, and Quality Research Unit, also in Pullman, WA, she delved into the relationships between microbial communities and soilborne fungal pathogens of wheat. Melissa's academic journey also includes degrees in Geology and Computer Science. Her expertise spans various fields, including cropping systems modeling, biogeochemistry, microbial ecology, soil acidification, and plant nutrient uptake and translocation. In her role within the CAF-LTAR, Melissa is actively involved in assessing, managing, and mitigating soil acidification, identifying sustainability determinants in Inland Pacific Northwest cropping systems, and integrating agroecological knowledge into decision support systems. Her current research projects focus on understanding the impact of soil acidification and mitigation approaches on crop production and soil health, as well as developing decision support systems enriched with insights into soil microbial ecology, rhizosphere processes, and weed biology. Additionally, she evaluates the sustainability of agronomic practices and crop rotations in the region, examining soil health, carbon cycling, and nutrient dynamics through field-scale modeling.