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APSIM Downloads for 17/18

 

For the 2017/18 year there were 2103 non-commercial licenced users registered (an 11% increase on the previous year). This resulted in some 3775 downloads of APSIM (all versions as some users download older versions or use multiple versions).

APSIM is being used in 116 countries around the world, around the same number as the previous year. In Australia there are 482 users (up from 462 the previous year), with 157 in Queensland, an increase of 51 users. In New Zealand there were 46 users.

Monday, 30 July 2018/Author: Sarah Cleary/Number of views (96)/Comments (0)/
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SILO Redevelopment

Are you aware that the SILO climate database has been redeveloped. The new system is now available for use. Some benefits of the new system:
• all datasets are now free of charge (supported by the Queensland Government’s Open Data initiative)
• data can now be distributed as they are licensed under the Creative Commons Attribution 4.0 licence
• users can now download gridded data (data are in NetCDF format). Please see the new web site for more information about accessing the gridded data.
• the new web interface is much easier to use than the old interface
• the new Application Programming Interface (API) enables users to query the amount of observed data available at each station
• patched point datasets are available at nearly all (18,700) stations (previously patched datasets were only available at a modest subset of the stations)

The APSIM SILO mirror based out of Toowoomba will stop working soon. You will need to switch the new SILO climate database as soon as possible.

You can find the SILO Getting Started Guide in the Technical documentation section of http://www.apsim.info/Documentation.aspx

Monday, 25 June 2018/Author: Sarah Cleary/Number of views (137)/Comments (0)/
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4th Annual ISU APSIM Training Course

Iowa State University Department of Agronomy is hosting the 4th Annual ISU APSIM Training Course - Evaluating Production and Environmental Performance of Cropping Systems with APSIM. There are 34 participants from 12 U.S. states with interest in soils, crops, and atmospheric sciences. Look for updates on Twitter with #ISUAPSIM2018.  

Tuesday, 12 June 2018/Author: Sarah Cleary/Number of views (240)/Comments (0)/
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APSIM Training

September 18-19, Brisbane

The next APSIM training course will be held at the Queensland Bioscience Precinct, St Lucia on the 18th and 19th of September.  Please send your EOI and/or any questions to apsim@csiro.au
Tuesday, 12 June 2018/Author: Sarah Cleary/Number of views (199)/Comments (0)/
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Are you having problems with APSIM or have questions?

If you are using APSIM (version 7.x or APSIM Next Generation) and think you have found a software defect, you can submit a defect report here:

If you're not sure whether the behaviour you are seeing is a defect or not, you can talk to a developer or other users by posting on the support forum: http://www.apsim.info/Support.aspx. This forum can also be used for general questions about APSIM.

If you have questions relating to commercial access to APSIM or are interesting in attending APSIM training, then you can send an email to: apsim@csiro.au

Thursday, 26 April 2018/Author: Sarah Cleary/Number of views (337)/Comments (0)/
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FEATURES

APSIM demonstrates the importance of rotations for simulating climate impact assessments.

Author: Chris Murphy/Wednesday, 9 March 2016/Categories: Features


In a recently published article Teixeira et al. (http://dx.doi.org/10.1016/j.envsoft.2015.05.012) used APSIM to assess the impact of different methods of representing the initial conditions of the soil.  In climate impact studies, weather data are commonly taken over a 20-30 year period to assess inter-annual variability of crop production.  Often, for simplification, individual crops (monocultures) are sown on the same date every year and soil water and nitrogen are reinitialised to default values prior to planting (re-initialised monoculture). However, in reality crops are often grown in a rotation and the soil conditions they encounter at planting are the result of the water and nitrogen balances of the preceding crops and fallow periods.  APSIM is able to construct realistic rotations and represent carryover effects of crop sequences. Teixeira et al. simulated a continuous wheat (grain) ® wheat (forage) ® kale (forage) ® maize (grain) rotation over a 30 years to compare with re-initialised mono-culture simulations.  The production, water use and soil nitrogen of simulated crops were all sensitive to the method of simulation (re-initialised mono-culture vs. continuous rotation) and the sensitivities were greatest when inputs (water and nitrogen) were lowest. This paper shows that greater emphasis should be placed on obtaining suitable initial conditions for simulating crop production, particularly for low intensity crop production systems.  It is difficult to achieve this in single crop simulations, which illustrates the benefit of representing the carryover of soil conditions across multiple crops grown in a sequence as performed with APSIM in this study.



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