Queensland Department of Agriculture and Fisheries
Trial location(s)
Dystart, QLD
Aims
This project is gathering data from these trial sites to ascertain whether the one-off application of either P, K or sulfur (S) placed in these deeper more depleted layers can provide a grain yield benefit and whether that benefit can be maintained over several years.
Key messages
1. There was a 35% (970 kg/ha) grain yield response to the highest deep-P treatments in the 2018 sorghum crop.
2. There was no significant response to K in the 2018 sorghum crop.
3. Over 5 crops the deep-P treatments have produced between 2500-3000 kg/ha of extra grain over the zero P treatments.
4. After 5 crops the return on investment for 20 kg and 40 kg P/ha are 4.7 and 3.4 respectively.
Lead research organisation
Queensland Department of Agriculture and Fisheries
Host research organisation
N/A
Trial funding source
GRDC UQ00063
Related program
N/A
Acknowledgments
It is greatly appreciated to have the continued support of trial co-operators, by hosting this trial site. This work is funded by the Grains
Research and Development Corporation, University of Queensland and the Department of Agriculture and Fisheries under project UQ00063
Regional soil testing guidelines for the northern grains region.
Trial source data and summary not available Check the trial
report PDF for trial results.
Climate
Derived climate information
No observed climate data available for this trial. Derived climate data is
determined from trial site location and national weather sources.
Dystart QLD
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.
Trial report and links
2014 trial report
GRDC Final Report
UQ00063
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