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Eucalyptus Model

A model for Eucalyptus plantations has been released in APSIM Next Generation. The current version of the model is suitable for sub-tropical genotypes (e.g. Eucalyptus grandis, E. urophylla, E. saligna, and their hybrids) grown in temperate to tropical environments, as it has been validated and tested on data from multiple sites in Australia and Brazil. This model is suitable for broad-scale industrial plantations, but with further calibration and testing could be suitable for different management settings (e.g. agroforestry applications), or for different genotypes (e.g. temperate plantation genotypes). Examples provided include N-fertilising, irrigation, weeds, harvesting and replanting. The APSIM framework provides a flexible basis on which to further develop this model for both commercial and non-commercial applications. For commercial access, please email apsim@csiro.au 
Thursday, 13 December 2018/Author: Sarah Cleary/Number of views (5)/Comments (0)/
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APSIM Training - 20th and 21st February 2019

The next APSIM Training Workshop will be held in Brisbane on the 20th and 21st of February. 

The 2 day course is aimed at providing training in the use of the Agricultural Production Systems sIMulator (APSIM) focusing on the user interface. It is very 'hands on' with a mix of short presentations and tutorials relevant to research activities.

The course has been designed for both beginners and more advanced users who have developed simulations and require specific technical assistance. It will focus on individual needs with tutors providing one-on-one assistance. Common issues will be summarised and presented as more formal group tutorials.

The course will be limited to a maximum of 12 participants and can be tailored to meet specific needs of individuals and groups. A minimum of 10 participants will be required to run the course.

COURSE REQUIREMENTS

To successfully undertake this course you will need to have:

  • A Laptop PC:
  • A licensed copy of APSIM version 7.10 installed on the laptop;
  • For advanced users, current simulations you are working on, or background data for building simulations;
  • Organised all travel and accommodation associated with your training.

If you would like to register or have any questions, please email apsim@csiro.au

Thursday, 29 November 2018/Author: Sarah Cleary/Number of views (32)/Comments (0)/
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A simple demonstration of connecting APSIM to optimisation techniques

The APSIM Initiative Reference Panel has provided two examples for connecting APSIM to optimisation techniques.  These serve to demonstrate contrasting approaches in connecting APSIM to optimisation software. 

Examples can be found here:

Optimisation Techniques

Monday, 5 November 2018/Author: Sarah Cleary/Number of views (116)/Comments (0)/
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nasapower: NASA POWER Global Meteorology, Surface Solar Energy and Climatology Data Client

International users of APSIM can now enjoy easy access to APSIM metrological files (.met files) from NASA POWER via a new R package developed by USQ’s Associate Professor of Field Crops Pathology Dr Adam Sparks called nasapower now available on CRAN.  One of the functions in this new package takes the NASA POWER agroclimatology data and reformats it into an APSIM .met file for use in APSIM simulations.  Information and documentation for the new package can be found at https://ropensci.github.io/nasapower/.

Thursday, 18 October 2018/Author: Sarah Cleary/Number of views (130)/Comments (0)/
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Updated Instructions for Submission of Improvements to APSIM for Review

As a user of APSIM, you may access and modify all source code. As per the conditions agreed to on download, all modifications to APSIM must be submitted to the AI and be subject to the Reference Panel evaluation process before inclusion into the official APSIM release. Updated instructions for submitting Improvements to APSIM for review by the APSIM Initiative Reference Panel can be found here

It can be useful to notify the APSIM Initiative that you are planning on making an improvement to APSIM. This can often lead to others suggesting ideas or collaborators to work with. To do this you need to create an issue in GitHub with a description of what you intend doing. This is for APSIM 7.x and APSIM Next Generation.  Any queries, please email apsim@csiro.au.

Tuesday, 9 October 2018/Author: Sarah Cleary/Number of views (94)/Comments (0)/
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FEATURES

Simulating carbon dioxide fertilisation in crops

Author: Chris Murphy/Wednesday, 29 March 2017/Categories: Features

To model crop growth under the higher atmospheric carbon dioxide concentrations that will occur in the future, there needs to be and accurate representation of the link between atmospheric carbon dioxide concentrations and growth.

A review of APSIM’s crop models showed that carbon dioxide fertilisation effects were well founded, tested and documented in a number of important (mainly C3 crops) crops, notably wheat. There was agreement that many of these well founded representations could be generalised to other crops with similar photosynthetic pathways (e.g. generalising the science in wheat to other C3 crops). The situation was less well substantiated in crops with the C4 photosynthetic pathway.

The overall conclusion is that for a range of important crops, the general situation of representing carbon dioxide fertilisation effects on photosynthesis and transpiration in APSIM was close to the ‘state of the art’ given current understanding of, and data on the processes involved, and the aims of the APSIM model. There is an immediate need for better documentation of the representation of carbon dioxide fertilisation in APSIM, and a strategic need for further research and model development in this area.

For further details see the new paper titled Responses to atmospheric CO2 concentrations in crop simulation models: a review of current simple and semicomplex representations and options for model development in Global Change Biology at the following link.

Recommendations relevant to the APSIM modelling community are:

1.That the current RUE, TE and CNC parameters for CO2 fertilization in wheat be implemented in all C3 plants, and parameters in maize be implemented in all C4 plants (unless the code based makes that really difficult).

2. That he current status of the representation, parameterisation and validation of CO2 fertilisation of plants in APSIM compiled by Vanuytrecht and Thorburn is made available here.

3. That plant models developed in the PMF be required to have CO2 fertilization included before being approved for inclusion in APSIM by the Reference Panel. 


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