H.A. Kettles

Is soil acidification the cause of biochemical responses when soils are amended with heavy metal salts?

T. W. Speir, H.A. Kettles, H. J. Percival et al. · Soil Biology and Biochemistry · 1999 · 158 citations

Environmental Chemistry, Engineering, Environmental Engineering +6

Impact of pasture contamination by copper, chromium, and arsenic timber preservative on soil microbial properties and nematodes

Richard D. Bardgett, T. W. Speir, D.J. Ross et al. · Biology and Fertility of Soils · 1994 · 135 citations

Soil Microbial Properties, Engineering, Pasture Contamination +10

A simple kinetic approach to derive the ecological dose value, ED50, for the assessment of Cr(VI) toxicity to soil biological properties

T. W. Speir, H.A. Kettles, A. Parshotam et al. · Soil Biology and Biochemistry · 1995 · 125 citations

Engineering, Environmental Engineering, Soil Pollution +9

Impact of Land‐Applied Tertiary‐Treated Effluent on Soil Biochemical Properties

Louis A. Schipper, Julie C. Williamson, H.A. Kettles et al. · Journal of Environmental Quality · 1996 · 109 citations

Basal Respiration, Biogeochemistry, Engineering +14

Changes in soil organic C, microbial C and aggregate stability under continuous maize and cereal cropping, and after restoration to pasture in soils from the Manawatu region, New Zealand

Graham P. Sparling, T. Graham Shepherd, H.A. Kettles · Soil and Tillage Research · 1992 · 98 citations

Biogeochemistry, Engineering, Soil Ecology +11