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Assessing the Potential for Zone-Specific Management of Cereals in Low-Rainfall South-Eastern Australia: Combining On-Farm Results and Simulation Analysis

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Title Assessing the Potential for Zone-Specific Management of Cereals in Low-Rainfall South-Eastern Australia: Combining On-Farm Results and Simulation Analysis
 
Creator Hoffmann, Munir
 
Contributor Llewellyn, Rick
Davoren, W.
Whitbread, Anthony
 
Subject apsim
plant available water capacity
 
Description In the low-rainfall region of south-eastern Australia, distinctive soil types reflecting
the typical landscape of higher elevated dunes and swale zones at the bottom
can be found within one field. Different soil characteristics cause consequently
large variability in cropping productivity between soils and across seasons. To
assess the possibilities for zone-specific management, five farmer fields were
zoned into a dune, mid-slope and swale zone. For each site, zone yields were
mapped over 2 years and soil properties were surveyed. This information was
used to parameterize and validate the APSIM model for each zone. Field-measured
PAWC increased from the dune to the swale zone. On-farm results and
simulation analysis showed distinctive yield performance of the three designed
zones. However, yield is not related to PAWC, it is rather a complex relationship
between soil type, fertility and rainfall. While in high-rainfall years, the swale
zones yielded higher due to higher soil organic carbon content and less drainage
losses, the dune zones performed better in the low-rainfall years due to lower
evaporation losses. This study emphasizes that in this specific environment where
soil variation in texture and subsoil constraints strongly influence crop performance,
mechanistic crop models and long-term field observations are necessary
for better understanding of zone-specific performance, and simple linear relationships
across years or sites are not useful.
 
Date 2016-04-28
2017-02-08T18:20:35Z
2017-02-08T18:20:35Z
 
Type Journal Article
 
Identifier http://oar.icrisat.org/id/eprint/9455
https://mel.cgiar.org/reporting/download/hash/GsfB3B5G
Munir Hoffmann, Rick Llewellyn, W. Davoren, Anthony Whitbread. (28/4/2016). Assessing the Potential for Zone-Specific Management of Cereals in Low-Rainfall South-Eastern Australia: Combining On-Farm Results and Simulation Analysis. pp. 1-5.
https://hdl.handle.net/20.500.11766/5571
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Wiley
 
Source Journal of Agronomy and Crop Science;(2016) Pagination 1,5