Organic farming in New Zealand; landscape evolution in western Hawkes Bay; recent history of the active Waewaepa, Mohaka and Ruahine faults; soil mapping and land resources of Horowhenua; soil and geological mapping of Limestone Downs, Waikato; Quaternary stratigraphy in southern North Island; Mid to late Pleistocene emergence of Wanganui-Manawatu regions; the Quaternary geology of the Mt Ruapehu and Mt Tongariro ring plans; the loess and tephras of NE Oregon; Paleoclimate information derived from loess/paleosol sequences; tephrochronology and erosion history of the Waipaoa Catchment, Gisborne (collaboration with MARGINS). Sustainable use of land, particularly hill and steep-land; teaching farmers to map their own soils and land resources.