Browsing by Supervisor "Schipper, Louis A."
Now showing items 1-20 of 42
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Assessing dissolved organic carbon export from Kopuatai bog, New Zealand
(University of Waikato, 2013)Peatlands sequester carbon (C) through CO₂ uptake and, ultimately, storage as peat. Carbon is lost from peatlands though gaseous pathways (as CO₂ and CH₄) and water pathways as dissolved organic C (DOC), dissolved inorganic ... -
Cadmium accumulation in agricultural soils
(The University of Waikato, 2017)Cadmium (Cd) has accumulated in New Zealand (NZ) soils as a result of phosphate fertiliser application. Cadmium is a biotoxic heavy metal and can be adsorbed by soil and enter the human food chain. Three objectives were ... -
Can naturally occurring glucosinolate related compounds from brassica crops act as biological nitrification inhibitors and reduce nitrous oxide emissions?
(The University of Waikato, 2018)Nitrous oxide (N₂O) is problematic as it is a potent greenhouse gas with a global warming potential about 298 times that of carbon dioxide, and it also contributes to the depletion of stratospheric ozone. The use of ... -
Carbon dioxide and methane emissions from the Te Arawa lakes of Rotorua, New Zealand
(University of Waikato, 2016)One of the biggest issues confronting humankind today is global warming due to the rapidly increasing greenhouse gas (GHG) emissions, namely CO₂, CH₄ and N₂O. The Intergovernmental Panel for Climate Change (IPCC) has ... -
Carbon dioxide losses from terrestrial organic matter resulting from photodegradation and microbial respiration
(University of Waikato, 2010)Losses of soil organic matter (SOM) can lead to a decrease in soil quality, cause an increase in CO₂ emissions, thereby contributing to a rise in atmospheric CO₂ concentration, which in turn can affect the global climate. ... -
Carbon dynamics in restiad peatlands across different timescales
(The University of Waikato, 2020)Peatlands contain one of the largest terrestrial carbon stores on the planet, and one which is known to interact with climate and global biogeochemical cycling of nutrients. Peatlands maintain their carbon primarily through ... -
Carbon dynamics of a dairy pasture: annual balance and impact of cultivation
(The University of Waikato, 2010)Maintenance of soil carbon (C) content is important because a relatively small percentage change in the global soil C store has the potential to cause a large change in atmospheric CO₂ concentration. Losses of soil C can ... -
Carbon inputs to soil from roots of two contrasting pasture swards
(University of Waikato, 2016)The soil carbon (C) pool is one of the largest pools of C in the terrestrial environment. Soil management strategies to increase soil C are of interest globally to reduce atmospheric CO₂ concentrations which are contributing ... -
Changes in carbon and nitrogen stocks following conversion of plantation forest to dairy pasture on pumice soils, in the Central North Island
(University of Waikato, 2011)Since 1990 approximately 36,000 ha of land in the Waikato has been converted from pine plantation to dairy farms. By changing land use from plantation forest to pasture there is potential to change soil properties. The ... -
Changes in carbon and nitrogen stocks following conversion of plantation forest to dairy pasture on Vitrands (Pumice Soils), New Zealand
(2010)Between 1990 and 2010 some New Zealand plantation forests underwent deforestation to establish dairy farms. The main area of land-use conversion to pasture is to the north of Lake Taupo in the Central North Island (Figures ... -
Comparison of soil carbon and nitrogen stocks of adjacent dairy and drystock pastures
(University of Waikato, 2012)The largest terrestrial store of carbon (C) is in soil and research has shown that anthropogenic land use change and management practices can alter soil C stocks. A concern is that small losses of soil C can contribute ... -
Contribution of Dissolved Organic Carbon Leaching to the Annual Carbon Budget of a Dairy Farm
(University of Waikato, 2013)Soils are the largest terrestrial store of carbon (C) and changes in this store of C can impact on soil quality and atmospheric CO2 concentrations. Research on C budgets at paddock to national scales has focused most ... -
Dairy farm system solutions that reduce nitrate leaching and their consequences for profitability: Using plantain, fodder beet and oats on a Canterbury case study farm
(The University of Waikato, 2020)Dairy products provide nutrition, energy and income for much of the world. It is currently necessary to continue their supply albeit in a more environmentally sustainable manner. Excess nitrate (NO₃⁻) from dairy cow urine ... -
Denitrification response to nutrient enrichment in New Zealand estuaries
(The University of Waikato, 2018)As coastal catchment land use intensifies, estuaries receive increased nutrient and sediment loads, resulting in habitats dominated by muddy organic-rich sediments. Nutrient processing and denitrification in estuarine ... -
Detection of differences in soil carbon and nitrogen stocks between paired dairy and drystock pastures
(University of Waikato, 2014)Soil is the largest terrestrial store of carbon (C) with some 2000 Pg to a depth of 1 m compared to 500 Pg in the atmosphere. Maximizing storage of C in soil is not only important for reducing atmospheric CO2 concentrations ... -
Ecohydrological characterisation of Whangamarino wetland
(University of Waikato, 2011)The Whangamarino wetland is internationally recognised and one of the most important lowland wetland ecosystems in the Waikato Region. The wetland’s hydrology has been altered by reduced river base levels, the installation ... -
Evaluation of a denitrifying bioreactor to improve water quality of tertiary treated water using DGT
(The University of Waikato, 2019)A proven nitrogen remediation strategy, denitrifying bioreactors are a low cost, edge-of-field approach for removing nitrate from subsurface drainage waters. The methodology to evaluate the performance of denitrifying ... -
Fluxes of carbon dioxide and water vapour at a Waikato peat bog
(The University of Waikato, 2003)New Zealand wetlands are threatened entities and the remaining 15% of pre-European freshwater wetlands are important refuges for plant and animal species, while also providing historical information on past environmental ... -
Impacts of conversion from forestry to pasture on soil physical properties of Vitrands (Pumice Soils) in central North Island, New Zealand
(IUSS, 2010-08-01)Tens of thousands of hectares of land have been converted from plantation forest to pasture in the central North Island of New Zealand between 2000 and 2010. The land use change was driven by the perceived better long term ... -
Impacts of conversion from forestry to pasture on soil physical properties of Vitrands (Pumice Soils) in the Central North Island, New Zealand
(University of Waikato, 2011)Abstract At least 30 000 hectares of land has been converted from plantation forest to pasture in the central North Island of New Zealand between 2000 and 2010. When forests are cleared for pasture the soil may undergo ...
