Profile Image

Lori A Hoagland

Horticulture and Landscape Architecture 

  • Assistant Professor of Horticulture
Horticulture Room 314

Area of Expertise: Microbial Ecology of Horticultural Systems


Feeding the world’s growing population while dealing with soil and water degradation, rapidly evolving pests and increasing climatic instability will require innovative solutions. In the Hoagland lab, we integrate applied studies in specialty crop production with fundamental research in soil microbial ecology to address these challenges. The soil microbial community regulates many key agroecosystem services including nutrient cycling and biological mediation of biotic and abiotic stress. Understanding of how to manage these communities to improve crop performance and environmental health, however, is in its infancy. Our research is guided by two primary hypotheses: 1) the biochemical quality of soil amendments affects competition and niche partitioning among soil microbial taxa and can be manipulated to affect provision of key agroecosystem services; and, 2) composition of the plant microbiome is under genetic control and varieties can be developed to exploit soil biotic resources and increase yield, quality and safety of produce. Specific goals of our on-going projects include:

  • Improving nitrogen-use efficiency in low-input and organic production systems
  • Biologically controlling soil-borne and foliar pathogens
  • Mitigating bioavailability and uptake of cadmium and lead
  • Identifying factors that affect colonization and survival of human pathogens
Details for two of our long-term projects aimed at managing foliar pathogens in tomato (TOMI) and improving nitrogen-use efficiency while limiting heavy metal uptake in carrots (CIOA) can be found at the following websites:

Courses Taught:

  • HORT 20100 – Plant Propagation (2010-2014)
  • HORT 52500 – The Plant Microbiome (formerly HORT 49000 Rhizosphere Ecology) (2014-present)
  • SFS/HORT 31200 – Introduction to Urban Agriculture (2015-present)
  • SFS/HORT 49000 – Agroecosystem Analysis (new study abroad course in Colombia in summer 2018)


  • PhD, Soil Microbiology and Biochemistry, Washington State University
  • MS, Agroecology, University of Nebraska-Lincoln
  • BS, Environmental Science, University of Nebraska-Lincoln

Horticulture & Landscape Architecture, 625 Agriculture Mall Drive, West Lafayette, IN 47907-2010 USA, (765) 494-1300

© Purdue University | An equal access/equal opportunity university | Integrity Statement | Copyright Complaints | Maintained by Agricultural Communication

Trouble with this page? Disability-related accessibility issue? Please contact us at agweb@purdue.edu so we can help.

Sign In