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Improving reliability of maize production in marginal rainfall environments of the North East Region
Citation
Birch, CJ and George, DL and Lisle, A and Solomon, F, Improving reliability of maize production in marginal rainfall environments of the North East Region, Proceedings of 16th Agronomy Conference 2012, 14-18 October 2012, University of New England, Armidale, NSW, pp. 1-6. (2012) [Refereed Conference Paper]
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Copyright Statement
Copyright 2012 the Regional Institute Ltd & the authors
Official URL: http://www.regional.org.au/au/asa/2012/crop-produc...
Abstract
Opportunities for expanded raingrown maize production in marginal rain:full areas (<600 mm annual
rain:full) in north-eastern Australia have been studied experimentally and using crop modelling. These
areas are characterised by high inter- and intra-seasonal variation in timing and amount of rainfall and
periodic water stress. This study used APSIM-Maize to assess impacts of soil, climate and selected
agronomic practices on predicted maize yield for early (late July-September) to late (January-February)
planting in 7 day intervals, phenotypes (14, 16, 18, 20 and 22 leaves), initial :fraction of
extractable water at planting (IFESW) (50, 65, 80 and 100%) of plant available water content,
typical soils and plant population (1.2 to 4.2 plants m-2) across 29 widely distributed locations in NE
Australia using around 100 years of weather data. Risk to crop production was assessed in terms of
:factors that contributed most to yield variability. Assessment of these :factors using a simple AN OVA
model showed site, IFESW, plant population, planting date, phenotype, plant population x IFESW,
site x planting date and soil within site to be the major contributors to variation in predicted yield.
Here we present an approach to analysis of the yield predictions as a way of identifying similar sites
where similar cultivar selection and agronomic practices would be appropriate.
Item Details
Item Type: | Refereed Conference Paper |
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Keywords: | maize, modelling, risk, density, maturity, soil water |
Research Division: | Agricultural, Veterinary and Food Sciences |
Research Group: | Crop and pasture production |
Research Field: | Agronomy |
Objective Division: | Plant Production and Plant Primary Products |
Objective Group: | Grains and seeds |
Objective Field: | Maize |
UTAS Author: | Birch, CJ (Associate Professor Colin Birch) |
ID Code: | 76207 |
Year Published: | 2012 |
Deposited By: | Agricultural Science |
Deposited On: | 2012-03-01 |
Last Modified: | 2014-08-12 |
Downloads: | 205 View Download Statistics |
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