G. P. Sparling

University of Waikato — New Zealand

Agricultural and Biological Sciences · Life Sciences

54h-index8.9kcitations109works0.02yr avg
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Research Topics

Soil Carbon and Nitrogen Dynamics(86), Soil and Water Nutrient Dynamics(35), Soil and Unsaturated Flow(27), Peatlands and Wetlands Ecology(13), Pesticide and Herbicide Environmental Studies(10)

Publications109 total

Estimates of annual leaching losses of dissolved organic carbon from pastures on Allophanic Soils grazed by dairy cattle, Waikato, New Zealand
New Zealand Journal of Agricultural Research·2016· 24 cited
Changes in characteristics of soils irrigated with processing wastewater from three New Zealand dairy factories
Soil Research·2015· 3 cited
Changes in soil total C and N contents at three chronosequences after conversion from plantation pine forest to dairy pasture on a New Zealand Pumice soil
Soil Research·2014· 10 citedOpen Access
Multiple small monthly doses of dicyandiamide (DCD) did not reduce denitrification in Waikato dairy pasture
New Zealand Journal of Agricultural Research·2012· 6 cited
Rates of accumulation of cadmium and uranium in a New Zealand hill farm soil as a result of long-term use of phosphate fertilizer
Agriculture Ecosystems & Environment·2011· 96 cited
Accumulation of soil organic C and change in C:N ratio after establishment of pastures on reverted scrubland in New Zealand
Biogeochemistry·2009· 46 cited
Soil characteristics, belowground diversity and rates of simazine mineralisation of a New Zealand Gley Soil in a chronosequence under horticultural use
Biology and Fertility of Soils·2007· 3 cited
Nutrient leaching and changes in soil characteristics of four contrasting soils irrigated with secondary-treated municipal wastewater for four years
Soil Research·2006· 40 cited
What is Soil Organic Matter Worth?
Journal of Environmental Quality·2006· 94 citedOpen Access
An approach for estimating when soils will reach maximum nitrogen storage
Soil Use and Management·2004· 39 cited
An approach for estimating when soils will reach maximum nitrogen storage
Soil Use and Management·2004· 54 cited
Trends in some soil test data over a 14‐year period in New Zealand
New Zealand Journal of Agricultural Research·2004· 42 citedOpen Access
Soil quality monitoring in New Zealand: practical lessons from a 6-year trial
Agriculture Ecosystems & Environment·2004· 118 cited
Three Approaches to Define Desired Soil Organic Matter Contents
Journal of Environmental Quality·2003· 61 cited
Three Approaches to Define Desired Soil Organic Matter Contents
Journal of Environmental Quality·2003· 14 cited
Soil Quality in New Zealand
Journal of Environmental Quality·2002· 28 cited
Soil Quality at a National Scale in New Zealand
Journal of Environmental Quality·2002· 122 cited
Predicting groundwater nitrate concentrations in a region of mixed agricultural land use: a comparison of three approaches
Environmental Pollution·2001· 323 cited
Immobilisation and mineralisation of carbon and nitrogen from dairy farm effluent during laboratory soil incubations
Australian Journal of Soil Research·2001· 22 cited
The effect of mineralisation rates of atrazine in surface and subsurface soils on its groundwater contamination potential
Australian Journal of Soil Research·2001· 11 cited
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Frequent Co-authors

Louis A. Schipper(9), A.W. West(5), Bradley P. Degens(4), D.J. Ross(4), C.W. Feltham(3), John Reynolds(2), C. D. A. McLay(2), P. B. S. Hart(2), KN Whale(2), William D. Grant(2), Lynette K. Abbott(2), AW West(2), M. V. CHESHIRE(2), C. M. MUNDIE(2), Daniel V. Murphy(2), I. R. P. Fillery(2), T. W. Speir(2), B. G. Ord(2), D. Vaughan(2), AW West(2)