Effects of gypsum and legumes on soil pH and soil organic C - Exp 2

2014

Research organisatons
Funding source

Trial details

Researcher(s) Ehsan Tavakkoli (ex UoA), Suzanne Holbery (ex SARDI), Ian Richter (SARDI), Roy Latta (ex SARDI), Pichu Rengasamy and Glenn McDonald (UoA)
Year(s) 2014
Contributor SARDI Minnipa Agricultural Centre
Trial location(s) Site 1, Minnipa Agricultural Centre, SA
Effects of gypsum and legumes on soil pH and soil organic C - Exp 2 locations
Aims

To examine the effect of gypsum on soil pH and soil C and whether changes in soil pH could alter productivity of the following cereal crops.

Key messages

Applying gypsum can reduce soil pH and lower the concentration of dissolved organic carbon (C) to 30 cm depth within a year. Soils with pH > 9 will benefit most from gypsum. The solubilisation of soil organic C increased markedly at pH above 8.5. The availability of aluminium (Al) in soil increases at pH above 9. There was no significant effect of gypsum on the biomass or yields of crops within 2 years.

Lead research organisation University of Adelaide
Host research organisation SARDI Minnipa Agricultural Centre
Trial funding source DAWR 1203.014
Related program National Soil Carbon Program
Acknowledgments

The work was funded by the Australian Department of Agriculture through the Filling the Research Gap under National Soil Carbon Program


Other trial partners Not specified
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Method

Crop type Wheat
Treatment type(s)
  • Fertiliser: Rate
  • Soil amelioration: Type
Trial type Experimental
Trial design Replicated

Minnipa Agricultural Centre 2014

Sow date Not specified
Harvest date Not specified
Plot size 10m x 3m
Plot replication 3
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Download results

Trial results Table 1

# Variety
Treatment 1
pH 10-20cm (pH) Grain yield (t/ha) pH 0-10cm (pH) pH 20-30cm (pH) Protein (%)
1 Wheat:Mace Gypsum rate 0 t/ha 9.02 3.4 8.98 9.1 9.6
1 Wheat:Mace Gypsum rate 2.5 t/ha 8.89 3.13 8.79 8.94 9.5
2 Wheat:Mace Gypsum rate 5 t/ha 8.8 3.04 8.59 8.9 9.4
2 Wheat:Mace
3 Wheat:Mace
3 Wheat:Mace

Grain yield t/ha


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pH 0-10cm pH


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pH 10-20cm pH


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pH 20-30cm pH


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Protein %


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Observed trial site soil information
Trial site soil testing
Not specified
Soil conditions
Trial site Soil texture
Site 1, Minnipa Agricultural Centre, SA Calcareous red sandy loam
Derived trial site soil information
Australian Soil Classification Source
Trial site Soil order
Site 1, Minnipa Agricultural Centre, SA Calcarosol
National soil grid Source
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 1, Minnipa Agricultural Centre SA 2014


Observed climate information

Rainfall trial gsr (mm) 290mm

Derived climate information

Site 1, Minnipa Agricultural Centre SA

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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.




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Trial last modified: 10-09-2019 15:18pm AEST