Agronomic performance of wheat (Triticum aestivum L.) and fertiliser use efficiency as affected by controlled and non-controlled traffic of farm machinery

Hussein, Mahmood A. H. and Antille, Diogenes L. and Chen, Guangnan and Luhaib, Adnan A. A. and Kodur, Shreevatsa and Tullberg, Jeff N. (2017) Agronomic performance of wheat (Triticum aestivum L.) and fertiliser use efficiency as affected by controlled and non-controlled traffic of farm machinery. In: 2017 ASABE Annual International Meeting, 16-19 July 2017, Spokane, Washington.

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Abstract

Controlled traffic farming (CTF) is a mechanization system that confines all load-bearing wheels to permanent traffic lanes, thus optimizing productivity of non-compacted crop beds for given energy, fertilizer and water inputs. This study investigated the agronomic and economic performance of winter wheat (Triticum aestivum L.) grown in compacted and non-compacted soils to represent the conditions of non-CTF and CTF systems, respectively. Yield-to-nitrogen (N) responses were obtained by applying urea (46% N), urea treated with 3,4-dimethyl pyrazole phosphate (DMPP), commercially known as ENTEC® urea (46% N), and urea ammonium nitrate (solution, 30%N) at rates between 0 (control) and 300 kg ha-1 N at regular increments of 100 kg ha-1 N. The results showed that the CTF system increased grain yield, total aboveground biomass, and harvest index by 12%, 9%, and 4%, respectively compared to the crop grown under the non-CTF system (P<0.05). Overall, the agronomic efficiency was approximately 35% higher in CTF compared with non-CTF (≈4 vs. 3 kg kg-1, respectively). Nitrogen use efficiency (NUE) was approximately 50% higher in CTF compared with non-CTF; however, there was not fertilizer type effect on NUE. On average, the optimal economic nitrogen application rates and corresponding grain yields were 122 kg ha-1 and 3337 kg ha-1, and 175 and 3150 kg ha-1 in the CTF and non-CTF systems, respectively. This work demonstrated that significant improvements in fertilizer-N recoveries may not be realized with enhanced nitrogen formulations alone and that avoidance of (random) traffic compaction is a pre-requisite for improved fertilizer use efficiency.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: Access to Published version in accordance with the copyright policy of the publisher.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 24 Oct 2017 03:17
Last Modified: 21 Jun 2018 01:18
Uncontrolled Keywords: controlled traffic, DMPP, enhanced N fertilizer formulations, nitrogen use-efficiency, soil compaction, urea ammonium nitrate, urea
Fields of Research : 09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
Identification Number or DOI: doi:10.13031/aim.201700586
URI: http://eprints.usq.edu.au/id/eprint/32891

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