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Assessment of the accuracy of profile available water and potential rooting depth estimates held within New Zealand's fundamental soil layers geo-database
(CSIRO Publishing, 2015)
© 2015 CSIRO. The Fundamental Soil Layers (FSL) serve historically as New Zealand's primary source of soil information. They contain a range of New Zealand's soil attribute information held in a spatial database. Despite ...
Evidence of prehistoric wind erosion of the Mackenzie Basin, South Island, New Zealand: an assessment based on ¹³⁷Cs and Kawakawa-Oruanui tephra
(CSIRO Publishing, 2015-01-12)
Many authors have reported significant soil erosion resulting from the grazing of sheep, rabbit plagues and invasion of the exotic Hawkweed (Hieracium sp.) in the sub humid alpine region of Mackenzie Basin, South Island, ...
Can the application of rare earth elements improve yield and decrease the uptake of cadmium in ryegrass-dominated pastures?
(CSIRO Publishing, 2015)
© 2015 CSIRO. Rare earth elements (REEs) have been linked to increases and decreases in plant growth and the uptake of biotoxic metals such as Cadmium (Cd). We hypothesised that under the right soil and climatic conditions ...
Oxygen isotopes of phosphate and soil phosphorus cycling across a 6500 year chronosequence under lowland temperate rainforest
(Elsevier, 2015-11)
Phosphorus (P) availability declines during ecosystem development due in part to chemical transformations of P in the soil. Here we report changes in soil P pools and the oxygen isotopic signature of inorganic phosphate ...
Increasing soil aeration reduces mitigation efficacy of dicyandiamide when targeted at ruminant urine-derived N₂O emissions
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2015-10-11)
Soil aeration effects on the efficacy of dicyandiamide (DCD) at reducing reactive nitrous oxide (N₂O) fluxes from ruminant urine patches have not been assessed. We tested the null hypothesis that increasing soil aeration ...
Treatment of pasture topsoil with alum to decrease phosphorus losses in subsurface drainage
(Elsevier B.V, 2015-09-01)
Phosphorus loss from land can impair surface water quality. Losses via subsurface flow can be substantial, but most strategies to mitigate P losses focus on surface runoff. Aluminium sulphate (alum) was applied at 25 and ...
Effects of cultivation on soil and soil water under different fertiliser regimes
(Elsevier B.V., 2015-01)
Nutrient exports from agriculture are an important environmental issue in many countries. In some production systems phosphorus (P) and nitrogen (N) accumulate at or near the soil surface and cultivation is one option for ...
Relationship between sediment chemistry, equilibrium phosphorus concentrations, and phosphorus concentrations at baseflow in rivers of the New Zealand National River Water Quality Network
(American Society of Agronomy, Inc., 2015-05)
Stream sediments can act as a source or a sink of dissolved (filtered) phosphorus (P) via abiotic and biotic processes. The cumulative action and magnitude of abiotic processes has been quantified by the equilibrium P ...
Evaluation of the stable isotope signatures of nitrate to detect denitrification in a shallow groundwater system in New Zealand
(Elsevier B.V., 2015-04-01)
Denitrification in the groundwater systems of agricultural catchments can provide a substantial ‘ecosystem service’ by attenuating leached nitrate (NO₃⁻) before it reaches surface water bodies. Samples along a groundwater ...
Ammonia volatilisation is not the dominant factor in determining the soil nitrate isotopic composition of pasture systems
(Elsevier B.V., 2015-01-01)
© 2014 Elsevier B.V. Nitrate dual isotopes (δ¹⁵N-NO₃⁻ and δ¹⁸O-NO₃⁻) are increasingly used to assess the sources and sinks of nitrogen (N) pollution in freshwater systems. However, the application of this methodology to ...