Browsing by Author "Parfitt, R.L."
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Correcting bulk density measurements made with driving hammer equipment
Parfitt, R.L.; Ross, C.W.; Schipper, Louis A.; Claydon, J.J.; Baisden, W. Troy; Arnold, Greg (Elsevier, 2010)Accurate measurement of dry bulk density is critical for determining stocks of elements such as carbon or nitrogen, in soils. During investigations of changes of soil carbon with time, we resampled soil profiles for bulk ... -
Evaluating 50 years of time-series soil radiocarbon data: Towards routine calculation of robust C residence times
Baisden, W. Troy; Parfitt, R.L.; Ross, C.W.; Schipper, Louis A.; Canessa, Silvia (Springer-Verlag, 2013)In 1959, Athol Rafter began a substantial programme of monitoring the flow of ¹⁴C produced by atmospheric thermonuclear tests through New Zealand's atmosphere, biosphere and soil. By building on the original measurements ... -
Gains and losses in C and N stocks of New Zealand pasture soils depend on land use
Schipper, Louis A.; Parfitt, R.L.; Ross, C.W.; Baisden, W. Troy; Claydon, J.J.; Fraser, S. (Elsevier, 2010)Previous re-sampling of 31 New Zealand pasture soil profiles to 1 m depth found large and significant losses of C and N over 2–3 decades. These profiles were predominantly on intensively grazed flat land. We have extended ... -
Influence of erosion and deposition on carbon and nitrogen accumulation in resampled steepland soils under pasture in New Zealand
Parfitt, R.L.; Baisden, W. Troy; Ross, C.W.; Rosser, B.J.; Schipper, Louis A.; Barry, B. J. (Elsevier, 2013)Although erosion occurs under pastures in New Zealand North Island hill country, previous work shows that the soils on mid-slopes (>19 degrees) have large and significant average gains of soil carbon (C) and nitrogen (N) ... -
Nitrogen inputs and outputs for New Zealand from 1990 to 2010 at national and regional scales
Parfitt, R.L.; Stevenson, Bryan A.; Dymond, John R.; Schipper, Louis A.; Baisden, W. Troy; Ballantine, D. J. (Taylor & Francis, 2012)Reactive nitrogen (N) is increasingly added to the New Zealand environment because of increased sales of N fertilizer and increased human population. The Greenhouse Gas Inventory now reports in detail on changes for N ...
Co-authors for R.L. Parfitt
R.L. Parfitt has 16 co-authors in Research Commons.