Explanipedia

Experimental and simulated data for crop and grassland production and carbon-nitrogen fluxes Open

Renáta Sándor, Fiona Ehrhardt, Peter Grace, Sylvie Recous, Pete Smith , et al. · 2024

Multi-year datasets from field experiments and simulations at five agricultural sites in the Northern Hemisphere were developed for three cropland sites in Ottawa (Canada), Grignon (France) and Delhi (India) and two grassland sites at Laqu…

A risk index tool to minimize the risk of nitrogen loss from land to water Open

R. W. McDowell, Val Snow, Reina Tamepo, Linda Lilburne, Rogerio Cichota , et al. · 2024

Simple models can help reduce nitrogen (N) loss from land and protect water quality. However, the complexity of primary production systems may impair the accuracy of simple models. A tool was developed that assessed the risk of N loss as t…

A response to ‘An examination of the ability of plantain ( Plantago lanceolata L.) to mitigate nitrogen leaching from pasture systems' Open

R. M. Monaghan, Val Snow, B.G. Welten, Diana Selbie, Jeff Morton , et al. · 2024

A method to derive nitrogen transport factors for New Zealand's agricultural lands Open

Val Snow, Rogerio Cichota, Linda Lilburne, R. W. McDowell, Shirley Vickers · 2024

Development of Algorithm for Determining N Fertiliser Requirements of Winter Wheat Based on N Status Using APSIM Modelling Open

Iris Vogeler, Uttam Kumar, Leif Knudsen, Elly Møller Hansen, Val Snow , et al. · 2024

The determination of optimum nitrogen (N) fertilisation rates, which maximise yields and minimise N losses, remains problematic due to unknown upcoming crop requirements and near-future supply by the soil. Remote sensing can be used for de…

Residual correlation and ensemble modelling to improve crop and grassland models Open

Renáta Sándor, Fiona Ehrhardt, Peter Grace, Sylvie Recous, Pete Smith , et al. · 2023

Silvopastoral System Pasture Growth Simulation and Sensitivity Analysis Using the Apsim-Tropical Pasture and Apsim-Slurp Models Open

Lucas Fillietaz Balcão, Mariana Andreucci, Val Snow, Dean Holzworth, Henrique Bauab Brunetti , et al. · 2023

How Modelers Model: the Overlooked Social and Human Dimensions in Model Intercomparison Studies Open

Fabrizio Albanito, David McBey, Matthew Tom Harrison, Pete Smith, Fiona Ehrhardt , et al. · 2022

There is a growing realization that the complexity of model ensemble studies depends not only on the models used but also on the experience and approach used by modelers to calibrate and validate results, which remain a source of uncertain…

The immediate impact of the first waves of the global COVID-19 pandemic on agricultural systems worldwide: Reflections on the COVID-19 special issue for agricultural systems Open

Emma C. Stephens, Jagadish Timsina, Guillaume Martin, Mark T. van Wijk, Laurens Klerkx , et al. · 2022

Perspectives on confronting issues of scale in systems modeling Open

Takuya Iwanaga, Patrick Steinmann, Amir Sadoddin, Derek T. Robinson, Val Snow , et al. · 2022

Issues of scale pervade every aspect of socio-environmental systems (SES) modeling. They can stem from the context of both the modeling process, and the purpose of the integrated model. A webinar hosted by the National Socio-Environmental …

Suitability of APSIM for Estimating Farm Nutrient Losses to Underpin New Zealand's Freshwater Policy and Regulations Open

Val Snow, Hamish Brown, Rogerio Cichota, Mark Lieffering · 2022

This document contains a summary of the expert opinion of the New Zealand members of the APSIM Reference Panel regarding the role APSIM could play in freshwater policy and regulation. The purpose of this document is to provide commentary o…

S-map parameters for APSIM Open

Iris Vogeler, Linda Lilburne, T. H. Webb, Rogerio Cichota, Joanna Sharp , et al. · 2022

Simulation-assisted machine learning for operational digital twins Open

Christos Pylianidis, Val Snow, Hiske Overweg, Sjoukje Osinga, John M. Kean , et al. · 2021

In the environmental sciences, there are ongoing efforts to combine multiple models to assist the analysis of complex systems. Combining process-based models, which have encoded domain knowledge, with machine learning models, which can fle…

Towards best-practice inclusion of cultural indicators in decision making by Indigenous peoples Open

Te Kīpa Kēpa Brian Morgan, John D. Reid, Oliver Waiapu Timothy McMillan, Tanira Kingi, Te Taru White , et al. · 2021

Acknowledgement that Indigenous Knowledge cannot be assimilated and readily generalised within reductionist scientific paradigms is emerging. The reluctance of Indigenous Peoples to adopt reductionist science-based interpretations is justi…

Comparing machine learning metamodels of different scale for pasture nitrogen response rate prediction Open

Christos Pylianidis, Val Snow, Hiske Overweg, Ioannis N. Athanasiadis · 2021

In this work we compare the performance of machine learning metamodels of different scale for the prediction of pasture grass nitrogen response rate using a case study across different locations in New Zealand. We first used a ran…

A protocol to build soil descriptions for APSIM simulations Open

Rogerio Cichota, Iris Vogeler, Joanna Sharp, Kirsten Verburg, Neil Huth , et al. · 2021

Resilience achieved via multiple compensating subsystems: The immediate impacts of COVID-19 control measures on the agri-food systems of Australia and New Zealand Open

Val Snow, Daniel Rodrı́guez, Robyn Dynes, William Kaye‐Blake, Thilak Mallawaarachchi , et al. · 2020

Irrigation Control through Acoustic Proximal Sensing of the Onset of Surface Water Open

Stuart Bradley, Anna Radionova, Chandra Prasad Ghimire, Laura J Grundy, Seth Laurenson , et al. · 2020

Irrigation is a useful crop enhancement procedure up to the point where free surface water appears. However, over-irrigation can lead to an accumulation of free water on the soil surface, which in turn results in overland flow and a high r…

Modeling Water Quality in Watersheds: From Here to the Next Generation Open

Baihua Fu, Jeffery S. Horsburgh, Anthony J. Jakeman, Carlo Gualtieri, Thorsten Arnold , et al. · 2020

In this synthesis, we assess present research and anticipate future development needs in modeling water quality in watersheds. We first discuss areas of potential improvement in the representation of freshwater systems pertaining to water …

Evaluating the Potential of Legumes to Mitigate N2O Emissions From Permanent Grassland Using Process‐Based Models Open

Kathrin Fuchs, Lutz Merbold, Nina Buchmann, Gianni Bellocchi, Marco Bindi , et al. · 2020

A potential strategy for mitigating nitrous oxide (N 2 O) emissions from permanent grasslands is the partial substitution of fertilizer nitrogen (N fert ) with symbiotically fixed nitrogen (N symb ) from legumes. The input of N symb reduce…

Application of circular economy principles to New Zealand pastoral farming systems Open

V. T. Burggraaf, Gina Lucci, S.F. Ledgard, Diógenes L. Antille, Val Snow , et al. · 2020

Global food production is under pressure to produce more from limited resources, with further expectations to reduce waste and pollution and improve social outcomes. Circular economy principles aim to design out waste and pollution, minimi…

Irrigation Control Through Acoustic Proximal Sensing of the Onset of Surface Water Open

Stuart Bradley, Anna Radionova, Chandra Prasad Ghimire, Laura J Grundy, Seth Laurenson , et al. · 2020

Irrigation is a useful crop enhancement procedure up to the point where free surface water appears. Thereafter, water can begin to flow into waterways, leaching nutrients and giving rise to environmental damage, as well as being a waste of…

Global Research Alliance N2O chamber methodology guidelines: Summary of modeling approaches Open

Donna Giltrap, Jagadeesh Yeluripati, Pete Smith, Nuala Fitton, Ward Smith , et al. · 2020

Measurements of nitrous oxide (N 2 O) emissions from agriculture are essential for understanding the complex soil–crop–climate processes, but there are practical and economic limits to the spatial and temporal extent over which measurement…

Editorial: Impacts of COVID-19 on agricultural and food systems worldwide and on progress to the sustainable development goals Open

Emma C. Stephens, Guillaume Martin, Mark T. van Wijk, Jagadish Timsina, Val Snow · 2020

Ensemble modelling of carbon fluxes in grasslands and croplands Open

Renáta Sándor, Fiona Ehrhardt, Peter Grace, Sylvie Recous, Pete Smith , et al. · 2020

Proximal remote sensing to quantify plot-scale overland flow connectivity Open

Chandra Prasad Ghimire, Val Snow, Stuart Bradley, Laura J Grundy · 2020

Irrigation of crops and grazed pastures can lead to harmful losses of nutrients via overland flow across the edge of the field. While good irrigation design can assist with avoiding overland flow, soil surface conditions can chang…

Characterisation of soil micro-topography using a depth camera Open

Laura J Grundy, Chandra Prasad Ghimire, Val Snow · 2020

Multimodel Evaluation of Nitrous Oxide Emissions From an Intensively Managed Grassland Open

Kathrin Fuchs, Lutz Merbold, Nina Buchmann, Daniel Bretscher, Lorenzo Brilli , et al. · 2019

Process‐based models are useful for assessing the impact of changing management practices and climate on yields and greenhouse gas (GHG) emissions from agricultural systems such as grasslands. They can be used to construct national GHG inv…

Can alternative forages substantially reduce N leaching? findings from a review and associated modelling Open

Racheal H. Bryant, Val Snow, Paul R. Shorten, B.G. Welten · 2019

Nitrogen (N) leaching losses from grazed pasture systems pose a risk to the environment with mitigation strategies urgently required to achieve regulatory limits. There has been increased interest in alternative forages to manipulate excre…

What is "sufficient" complexity when modelling urine patches in grazed pastures? Open

Val Snow, Rogerio Cichota, Russell McAuliffe, Robyn Dynes, Iris Vogeler , et al. · 2019

It is well-known that urine patches are the primary source of N leaching from intensively grazed pastures. Grazing ruminants regularly harvest N in pasture from the whole paddock but then deposit the majority of that ingested N into patche…

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