Abstract
THE USE OF controlled release and nitrification inhibiting fertilisers may improve the availability and uptake of Nitrogen (N) by sugarcane under certain soil and climatic conditions, while reducing losses via leaching, runoff and denitrification, and increasing nitrogen use efficiency. This paper utilises production and operational data from twelve Burdekin trial sites during the 2014-15 growing season to evaluate the profitability of using these fertilisers. In particular, this paper examines whether these fertilisers can maintain farmer profitability at N application rates lower than a conventional rate based on the Six Easy Steps guidelines. Out of the 12 trial sites, nine tested rates 40 kg N/ha lower and three tested rates 60 kg N/ha lower. Two controlled release blends were investigated in these trials. One treatment had 25% of total N coated with sulphur and polymer, while the other had 50% coated. For the nine sites that tested rates 40 kg N/ha lower than a conventional rate, analyses of variance were completed for each individual trial site but none identified a significant treatment effect. As all sites in each group had identical fertiliser treatments, multi-environment trial analyses were undertaken to improve statistical power. The results identified that the controlled release treatment with a 50% blend was significantly less profitable than all the other treatments except for the controlled release treatment with a 25% blend. In contrast, for the three sites comparing the conventional N rate with rates 60 kg N/ha less, treatment effects were identified at two of the three individual sites. However, the multi-environment trial analysis indicated no significant effect of treatment.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 4
Claim · model-written summary
At nine sites with 40 kg N/ha lower rates, individual analyses found no significant treatment effect on profitability.
- Taxon
- sugarcanet0
- Treatment
- rates 40 kg N/ha lowere0
- Outcome
- farmer profitabilitye1
- Comparator
- conventional ratee0
Not reportedDirection
Verbatim
e0“For the nine sites that tested rates 40 kg N/ha lower than a conventional rate, analyses of variance were completed for each individual trial site but none identified a significant treatment effect”
e1“farmer profitability”
t0“sugarcane under certain soil and climatic conditions”
Claim · model-written summary
The 50% controlled-release blend was significantly less profitable than all other treatments except the 25% blend.
Verbatim
e0“the controlled release treatment with a 50% blend was significantly less profitable than all the other treatments except for the controlled release treatment with a 25% blend”
e1“sugarcane under certain soil and climatic conditions”
Claim · model-written summary
At lower rates of 60 kg N/ha, treatment effects appeared at two of three individual sites.
- Taxon
- sugarcanee2
- Treatment
- rates 60 kg N/ha lesse0
- Outcome
- treatment effectse0
- Value
- two of the three individual sitese0
- Comparator
- conventional N ratee0
Not reportedDirection
Verbatim
e0“for the three sites comparing the conventional N rate with rates 60 kg N/ha less, treatment effects were identified at two of the three individual sites”
e1“farmer profitability”
e2“sugarcane under certain soil and climatic conditions”
Claim · model-written summary
Across the three sites, multi-environment analysis found no significant treatment effect.
- Taxon
- sugarcanee2
- Treatment
- rates 60 kg N/ha lesse1
- Outcome
- effect of treatmente0
- Comparator
- conventional N ratee1
Not reportedDirection
Verbatim
e0“the multi-environment trial analysis indicated no significant effect of treatment”
e1“the three sites comparing the conventional N rate with rates 60 kg N/ha less”
e2“sugarcane under certain soil and climatic conditions”
The same questions in other papers
nitrogen · yield · Saccharum officinarum (sugarcane)Results differ
18 papers in the same direction as this paper · 118 reporting no difference from an alternative
- positive
- positive
- positive
133 papers more in this group
See all 137 papers →fertilization · yield · Saccharum officinarum (sugarcane)Positive and negative results
33 papers in the same direction as this paper · 312 in the opposite direction
- positive
- positive
- positive
342 papers more in this group
See all 346 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.