Statistics vs statistics: what they mean and how they can influence results

2015

Research organisaton
Funding source

Trial details

Researcher(s) Claire Browne (BCG)
Rob Launder (Agritech Rural)
Year(s) 2015
Contributor Birchip Cropping Group
Trial location(s) Site 4, Horsham, VIC
Further information View external link
Related trials
Statistics vs statistics: what they mean and how they can influence results locations
Aims

To determine whether sowing direction influences wheat and barley grain yields in the southern grains region.

Key messages
  1. Yields were increased by 0.4t/ha (15%) in barley and 0.2t/ha (10%) in wheat at Horsham in 2014 by sowing east/west. Sowing direction did not alter grain quality. 
  2. Varietal characteristics (maturity, height and growth habit) were not found to influence the yield response.
  3. Similar findings have been found in NSW, in the presence of weeds, and WA, with or without weeds.
Lead research organisation Birchip Cropping Group
Host research organisation N/A
Trial funding source GRDC BWD00024
Related program Advancing Profitable Farming Systems
Acknowledgments

This project was jointly funded through the GRDC’s ‘Advancing Profitable Farming Systems’ (BWD00024) project and Agritech Rural, Horsham. 


Other trial partners Agritech Rural
Download the trial report to view additional trial information

Method

Crop type Barley
Treatment type(s)
  • Sowing
Trial type Experimental
Trial design Randomised,Replicated,Blocked

Horsham 2015

Sow rate or Target density 130 plants/m²
Sowing machinery

Knife points, press wheels, 30 cm row spacing

Sow date 16 May 2014 16 May 2014
Harvest date 13 November 2014 13 November 2014, 28 November 2014
Plot size Not specified
Plot replication Not specified
Fertiliser

Granulock Supreme Z @ 50 kg/ha at sowing followed by urea @ 90kg/ha applied at GS14 and GS37 (total 180kg/ha)

Herbicide

Weeds were controlled to best management practice.

Insecticide

Pests were controlled to best management practice.

Fungicide

Diseases were controlled to best management practice.

Download the trial report to view additional method/treatment information

Download results

Trial results Table 1

# Treatment 1
Protein (%) Grain yield (t/ha) Screenings (%) Test weight (kg/hL)
1 East West 15 0.32 4.02 76.75
2 North South 14.5 0.4 4.04 76.04

Grain yield t/ha


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Protein %


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Screenings %


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Test weight kg/hL


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Observed trial site soil information
Trial site soil testing
Site Depth Type pH EC P K N A OC CAT
Site 4, Horsham, VIC 0 - 10cm clay 8.20 14.00 1.20
Site 4, Horsham, VIC 0 - 100cm clay 48.00
Soil conditions
Trial site Soil texture
Site 4, Horsham, VIC Clay
Derived trial site soil information
Australian Soil Classification Source: ASRIS
Trial site Soil order
Site 4, Horsham, VIC Vertosol
Soil Moisture Source: BOM/ANU
Average amount of water stored in the soil profile during the year, estimated by the OzWALD model-data fusion system.
Year Site 4, Horsham VIC
2015 676.8mm
2014 688.0mm
2013 702.3mm
2012 704.1mm
2011 724.3mm
2010 731.0mm
2009 712.9mm
2008 694.6mm
2007 699.2mm
2006 680.2mm
2005 703.4mm
2004 696.3mm
2003 705.2mm
2002 677.6mm
2001 701.0mm
2000 628.8mm
National soil grid Source: CSIRO/TERN
NOTE: National Soil Grid data is aggregated information for background information on the wider area
Actual soil values can vary significantly in a small area and the trial soil tests are the most relevant data where available

Soil properties

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Climate

Site 4, Horsham VIC 2015


Observed climate information

Rainfall avg ann (mm) 226mm
Rainfall avg gsr (mm) 172mm

Derived climate information

Site 4, Horsham VIC

NOTE: Exact trial site locality unknown - Climate data may not be accurate
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Some data on this site is sourced from the Bureau of Meteorology

SILO weather estimates sourced from https://www.longpaddock.qld.gov.au/silo/
Jeffrey, S.J., Carter, J.O., Moodie, K.B. and Beswick, A.R. (2001). Using spatial interpolation to construct a comprehensive archive of Australian climate data , Environmental Modelling and Software, Vol 16/4, pp 309-330. DOI: 10.1016/S1364-8152(01)00008-1.