Research and Extension Programs

Research encompasses the use of observation and measurement to discover new knowledge, refine or refute existing knowledge, and develop technological innovations. Extension brings this knowledge and innovation to members of the public through community education and outreach. The research and extension activities carried out by faculty members, students, and staff in UH Mānoa’s Department of Tropical Plant and Soil Sciences (TPSS) are two components of our mission as part of Hawai‘i’s land-grant college and university. (The third component is academic instruction).

TPSS research and extension are integrated. Most faculty members participate in both research and extension activities, although the fraction of time dedicated to each varies among faculty appointments. Research is a required component of TPSS degrees, and students can find opportunities to participate in extension both through working with faculty members and by joining organizations that engage in community outreach, including the TPSS Horticulture Society and the Student Organic Farm Training program.

Granting agencies often require that projects they fund include coordinated research and extension efforts. Many TPSS facilities serve both research and extension functions. By linking the creation and propagation of knowledge, TPSS encourages members of the public to (1) benefit directly from the research they support through state and federal funding and (2) provide feedback to shape the direction of future investigations.

  • Classification of the Soils of Hawaii
    This web page allows the land use planners, extension agents, researchers, farmers,
    and others to make use of the common soil series names and their corresponding classification
    for soil management and for transfer of agrotechnology amongst and between similar soils.
  • Interpretation of the Soils of Hawaii
    This web page shows how the taxonomic names of soils can be used to make interpretation
    for soil management, land use planning, or land evaluation.
  • Suitability Rating for Coffee Production In Opeula Area, Hawaii
    This web page shows how soil suitability ratings can be used in land evaluation.
    Rating of soil map units in the Opaeula area of Oahu for coffee production is used as an example.
  • MauiNet
    This webpage describes the MauiNet and and some of the environmental diversity of Haleakala.

View a map of the locations of Cooperative Extension Offices and Research Stations, see CTAHR’s extension and research publications and videos, and look through a copy of the CTAHR Research News magazine.