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Now showing items 11-20 of 57
Seasonal fluctuations in phosphorus loss by leaching from a grassland soil
(Soil Science Society of America, 2004)
Phosphorus losses from soils have been reported to impair the water quality, resulting in deaths of fish and other marine animals, and can harm human health. The objective of this study was to determine the seasonal ...
¹⁵N recoveries from ruminant urine patches on three forage types
(Springer Verlag on behalf of the Royal Netherlands Society of Agricultural Science, 2017-05-17)
Background and aims: ¹⁵Nitrogen balances are useful tools to increase our understanding of soil N processes and the efficiency of plants in taking up animal urine-N. This study aimed to investigate the effect of forage ...
Lysimeters without edge flow: an improved design and sampling procedure
(Soil Science Society of America, 1992)
A description is given of a modified lysimeter design and sampling procedure designed to prevent edge flow from occuring in large soil monolith lysimeters. An internal cutting ring at the base of the lysimeter casing ...
Ruminant urine patch nitrification and N₂O flux: Effects of urine aucubin rate in a laboratory trial
(Taylor & Francis on behalf of Royal Society of New Zealand, 2019-06-10)
Livestock urine deposition onto grazed New Zealand pastures drives soil nitrous oxide (N₂O) emissions. Urine patch N₂O emissions can be reduced by inhibiting nitrification, a key urine patch nitrogen (N) transformation ...
Testing large area lysimeter designs to measure leaching under multiple urine patches
(Taylor and Francis Group on behalf of the Royal Society of New Zealand, 2017)
A novel, large area, repacked rectangular shipping container lysimeter (13.8 m² ) was compared with those from undisturbed monolith barrel lysimeters (c. 3.1 m² ), to evaluate their utility for measuring leaching under ...
Improvement of degraded soil physical conditions following the establishment of permanent pasture
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2017)
Conventional cultivation practices are known to degrade the physical properties of soils. The objective of this study was to measure changes in soil physical conditions following the establishment of permanent pasture ...
Effects of plantain in pasture on nitrous oxide emissions from cattle urine patches, as affected by urine deposition timing and soil type
(Taylor & Francis on behalf of The Royal Society of New Zealand, 2021-10-17)
Two lysimeter experiments were conducted to quantify the effect of including plantain in pasture on nitrous oxide (N₂O) emissions from cattle urine patches, as affected by urine deposition timing and soil type. In experiment ...
Effect of soil moisture status and a nitrification inhibitor, dicyandiamide, on ammonia oxidizer and denitrifier growth and nitrous oxide emissions in a grassland soil
(Elsevier, 2014-06)
Nitrous oxide (N₂O) is a potent greenhouse gas and is produced in the soil by nitrification and denitrification processes. These processes are catalysed by a number of key enzymes from microbial communities in the soil. ...
Short-term grazing and urination behaviour of dairy cows differing in their genetic merit
(Taylor & Francis on behalf of the Royal Society of New Zealand, 2018-10-21)
Breeding cows for improved production and production efficiency may have led to indirect selection for behavioural traits including grazing and urination behavioural patterns. This study investigated the relationship between ...
The effect of urinary nitrogen loading rate and a nitrification inhibitor on nitrous oxide emissions from a temperate grassland soil
(Cambridge University Press, 2014-12)
Nitrous oxide (N₂O) emissions associated with urine nitrogen (N) deposition during grazing are a major component of greenhouse gas emissions from domestic livestock. The present study investigated the relationship between ...