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    The fate of urine nitrogen: A grassland lysimeter study in Ireland 

    Selbie, Diana; Cameron, Keith C.; Di, Hong J.; Moir, James L.; Lanigan, G. J.; Richards, K. G. (Fertilizer and Lime Research Centre, 2014-02)
    In grazed pasture systems, the nitrogen (N) contained in a cattle urine patch may be up to 1200 kg N ha⁻¹. The majority of this N is in excess of plant requirements and is vulnerable to environmental loss. In this study, ...
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    The effect of optimum vs deficit irrigation on plant nitrogen uptake and nitrate leaching loss from soil 

    Carlton, Anna; Cameron, Keith C.; Edwards, Grant; Di, Hong J.; Clough, Timothy J. (Fertilizer and Lime Research Centre, Massey University, 2016)
    Nitrate (NO₃⁻) leaching, associated with urine nitrogen (N) deposition during grazing is recognised as a significant environmental problem. In this study it was hypothesised that optimum irrigation could increase plant ...
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    A synergistic mitigation technology for nitrate leaching and nitrous oxide emissions for pastoral agriculture 

    Di, Hong J.; Cameron, Keith C.; Roberts, A.
    Report on a mitigation technology which is synergistic for the reduction of both NO3 leaching and N2O emissions and also for the improvement of pasture yield.
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    Can a winter-sown catch crop reduce nitrate leaching losses after winter forage grazing? 

    Carey, Peter; Cameron, Keith C.; Di, Hong J.; Edwards, Grant; Chapman, D. F. (Fertilizer and Lime Research Centre, 2016)
    Direct grazing of winter forage crops to feed non-lactating, pregnant dairy cows prior to calving is a common management practice in the New Zealand South Island. However, the high crop yields per hectare grazed, combined ...
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    Inhibition of ammonia oxidisers to control nitrification rate under simulated winter dairy forage grazing conditions: An incubation study 

    Hill, Anne-Maree; Di, Hong J.; Cameron, Keith C.; Podolyan, Andriy (Fertilizer and Lime Research Centre, 2013)
    The microbial process of nitrification plays a key role within the soil nitrogen cycle. Nitrification is the process where ammonia is oxidised to nitrite and then to nitrate and this process can have major negative ...
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    Urine patch area coverage of an intensively stocked dairy pasture 

    Moir, James L.; Cameron, Keith C.; Di, Hong J.; Fertsak, Ulrike (International Union of Soil Science, 2010-08)
    The urine patch of the grazing cow has been identified as the key source of N loss from pasture-based dairy systems. Although critical to N modelling, quantitative data on the annual area coverage of urine patches in pastures ...
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    Urine patch area coverage of an intensively stocked dairy pasture 

    Moir, James L.; Cameron, Keith C.; Di, Hong J.; Fertsak, Ulrike (Lincoln University., 2010-08)
    The objective of this study was to develop a new method to quantify seasonal and annual urine patch area coverage under an intensive dairy farming system.
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    Dry matter intake and body condition score change of dairy cows grazing fodder beet, kale and kale-oat forage systems in winter 

    Edwards, Grant; de Ruiter, J. M.; Dalley, D. E.; Pinxterhuis, I. J. B.; Cameron, Keith C.; Bryant, Racheal H.; Di, Hong J.; Malcolm, Brendon J.; Chapman, D. F. (NZGA, 2014)
    Crop dry matter (DM) yield, DM utilisation and body condition score (BCS) of dairy cows were measured over two winters on an irrigated stony, free-draining Balmoral soil for three crop grazing systems: fodder beet (FB); ...
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    Soil inorganic nitrogen in spatially distinct areas within a commercial dairy farm in Canterbury, New Zealand 

    Ekanayake, Dinanjana; Owens, Jennifer; Hodge, Simon; Trethewey, Jason; Roten, Rory; Westerschulte, M.; Belin, S.; Werner, Armin; Cameron, Keith C. (New Zealand Grassland Association, 2017)
    For precision nitrogen (N) fertilisation of grazed dairy paddocks, soil N distribution needs to be quantified. It is expected that farm infrastructure will affect inorganic-N distribution due to its influence on cow grazing ...
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    Fertiliser-coating technology to improve the efficiency of copper uptake in pastures 

    Carey, Peter; Cameron, Keith C.; Di, Hong J.; Cotching, B. (Fertilizer and Lime Research Centre, Massey University, 2018)
    Current practice for trace element (TE) application is to admix granular trace elements in with macro-elemental fertilisers. Although the correct rate of trace elements per hectare can be applied, the distribution of the ...
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    Cameron, Keith C. (13)
    Di, Hong J. (12)Moir, James L. (4)Carey, Peter (3)Edwards, Grant (3)Chapman, D. F. (2)Fertsak, Ulrike (2)Lanigan, G. J. (2)Richards, K. G. (2)Roberts, A. (2)... View MoreKeyword
    0703 Crop and Pasture Production (13)
    0503 Soil Sciences (5)079902 Fertilisers and Agrochemicals (incl. Application) (5)nitrate leaching (4)nitrogen (4)0701 Agriculture, Land and Farm Management (3)0702 Animal Production (3)grazed pasture (3)nitrification inhibitor (3)urine (3)... View MoreDate Issued2018 (1)2017 (1)2016 (2)2014 (3)2013 (1)2012 (2)2010 (2)
    This service is maintained by Learning, Teaching and Library
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