To evaluate the rate of breakdown and nutrient release of a resin coated urea relative to traditional Nitrogen Sources (Urea and Maxam).
Key messages
Over all there were no significant N responses despite a high yield potential and leaching rains.
Tissue tests did indicate some differences in the timing of N uptake (later in the case of the coated urea), however none of these differences resulted in differences in N efficiency.
Lead research organisation
Summit Fertilizers
Host research organisation
N/A
Related program
N/A
Acknowledgments
Thanks to Kalyx Agriculture for conducting the research and the West Midlands group for supplying the land for the trial and making the research possible
Topdressed N treatments were applied to the site in mid July to a farmer sown crop that had received 100kg/ha of an NPK supplying approximately 10 kg/ha N and 12 kg/ha P and K, as well as trace elements. Additional N was then supplied to half of the plots on the 31st of August in the form of standard urea.
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.
