|Contributor||West Midlands Group|
To investigate potassium and lime responses and effects on lime and potassium requirements.
Barley yields exceeded 5 t/ha with strong responses to lime and potassium fertiliser.
The 1.0 t/ha response to potassium (K) was not as strong as in the previous two wheat crops (1.4 t/ha in 2013 and 2.4 t/ha in 2014). This was probably partly due to better control of ryegrass in plots without K fertiliser compared to previous years.
The response to lime applied in 2011 and 2014 was also 1.0 t/ha. This followed a 0.35 t/ha response in 2014 wheat. Like 2014, lime did not affect response to K.
Compared to topdressing potash, banding K increased early crop vigour, but 140 kg/ha K-Till Extra (15K) did not supply enough K to satisfy demand of the high yield potential.
This trial has highlighted the importance of maintaining K inputs (if required) when undertaking liming programs.
Ongoing responses to lime are likely to increase future demand for K because soil reserves will be depleted at an increasing rate.
|Lead research organisation||
|Host research organisation||
West Midlands Group
|Other trial partners||Not specified|
|Sow rate or Target density||80kg/ha|
|Sow date||17 May 2016|
|Harvest date||29 November 2016|
|Plot size||Not specified|
|Plot replication||Not specified|
12 Apr MoP
30 Jun 140 L/ha Flexi-N (basal)
|Rainfall trial gsr (mm)||364mm|
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.