Now showing items 1-6 of 6
Quantifying contaminant losses to water from pastoral landuses in New Zealand II. The effects of some farm mitigation actions over the past two decades
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2021-01-28)
In New Zealand the primary sector together with central and local government agencies have been promoting measures to mitigate the adverse effect of farming practices on water quality over the last few decades. We assessed ...
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 ...
A cost-effective management practice to decrease phosphorus loss from dairy farms
(American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America, 2014-11)
Phosphorus (P) loss from land can impair surface water quality. A paired-catchment study was conducted on a grazed dairy farm that tested the hypothesis that cultivating and sowing a low-P-requiring grass in near stream ...
Using the provenance of sediment and bioavailable phosphorus to help mitigate water quality impact in an agricultural catchment
(American Society of Agronomy, Inc., 2016-07)
The quality and health of surface waters can be impaired by sediment and sediment-bound phosphorus (P). The Waituna Lagoon catchment in southern New Zealand has undergone agricultural intensification that has been linked ...
Quantifying contaminant losses to water from pastoral landuses in New Zealand I. Development of a spatial framework for assessing losses at a farm scale
(Taylor & Francis on behalf of The Royal Society Te Apārangi, 2021-06-07)
Assessing the effectiveness of mitigation measures for reducing contaminant losses to water from pastoral farming systems is a challenging task. Two important factors that contribute to this challenge are (i) the considerable ...
Does variable rate irrigation decrease nutrient leaching losses from grazed dairy farming?
(Wiley on behalf of the British Society of Soil Science, 2017-12)
The irrigation of grazed dairy pastures can be highly profitable, but can lead to the enhanced leaching of nitrogen (N) and phosphorus (P) and impairment of freshwater quality. A six-year study was conducted to determine ...