To assess the economic benefit of variable rate nitrogen application, when combined with crop sensor information and yield potential zones to build the variable rate application map.
Key messages
In 2011 optimised variable rate N applications increased gross margins by $11- $22/ha in two barley crops.
In 2012 variable rate N applications increased gross margins by $13-$20/ha in three wheat crops, based on yield response and fertiliser savings.
Increases in grain protein of 0.3 – 0.5% have been observed.
Trial source data and summary not available Check the trial
report PDF for trial results.
Climate
Hart SA 2011
Observed climate information
Rainfall trial gsr (mm)
168mm
Derived climate information
Hart SA
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.
