Abstract
On the Darling Downs the growth and yield of a semi-dwarf wheat (cv. Oxley) under supplementary irrigation was increased by the application of up to 400 kg/ha of nitrogen (N) at planting. Nitrogen at 50 or 100 kg/ha applied at the boot stage to supplement 100 kg/ha applied at planting increased grain yield by 459 and 478 kg/ha, respectively. However, yields were still below those where all the N was applied at planting. In contrast, supplementary N (0, 25, 50 or 100 kg/ha) at flowering or after flowering generally did not increase grain yield. One exception to this was where only 50 kg/ha was applied at planting; an additional 100 kg/ha at flowering increased grain yield by 602 kg/ha. Applied at planting, more than 200 kg/ha of N was needed to produce premium grade wheat (i.e. protein content above 11.4%). To achieve this protein content where 100 kg/ha had been applied at planting an additional 100 kg/ha was needed at the boot stage or 50 kg/ha at flowering. Applied after flowering, up to 100 kg/ha of additional N produced wheat of a protein content too low to attract a premium payment. A similar quantity of N was assimilated whether the entire N application was applied at planting or where the application was split between planting and boot or flowering. Less N was assimilated when the application was split between planting and after flowering. More N was assimilated from soil than from foliar applications at the boot stage. Soil and foliar applications were equally effective at flowering in increasing the amount of N assimilated as well as the grain protein content. However, after flowering foliar application was the more effective method. The application of N at flowering to increase the protein content of this semi-dwarf cultivar is not an attractive commercial practice. The price ratio of premium to Australian Standard White wheat in recent years (<1.071 ) is less than that needed (1.0954-1.3013) to justify splitting the N application to lift grain protein content above 11.4% at the expense of yield.
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Claims 17
Claim · model-written summary
Planting nitrogen up to 400 kg/ha increased wheat growth and yield.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- up to 400 kg/ha of nitrogen (N) at plantinge0
- Outcome
- growth and yielde0
- Direction
- increasede0
- Setting
- supplementary irrigatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of a semi-dwarf wheat (cv. Oxley) under supplementary irrigation was increased by the application of up to 400 kg/ha of nitrogen (N) at planting”
Claim · model-written summary
Boot stage 50 kg/ha N increased grain yield 459 kg/ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 50e0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 459e0
- Comparator
- 100 kg/ha applied at plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at 50 or 100 kg/ha applied at the boot stage to supplement 100 kg/ha applied at planting increased grain yield by 459 and 478 kg/ha, respectively”
t0“wheat”
Claim · model-written summary
Boot stage 100 kg/ha N increased grain yield 478 kg/ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 100 kg/ha applied at the boot stagee0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 478 kg/hae0
- Comparator
- 100 kg/ha applied at plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen at 50 or 100 kg/ha applied at the boot stage to supplement 100 kg/ha applied at planting increased grain yield by 459 and 478 kg/ha, respectively”
t0“wheat”
Claim · model-written summary
These split applications yielded less than applying all N at planting.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- yieldse0
- Direction
- belowe0
- Comparator
- all the N was applied at plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“yields were still below those where all the N was applied at planting”
t0“wheat”
Claim · model-written summary
N at flowering or later generally did not increase grain yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- supplementary N (0, 25, 50 or 100 kg/ha) at flowering or after floweringe0
- Outcome
- grain yielde0
- Direction
- did not increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“supplementary N (0, 25, 50 or 100 kg/ha) at flowering or after flowering generally did not increase grain yield”
t0“wheat”
Claim · model-written summary
With 50 kg/ha planting N, 100 kg/ha at flowering raised yield by 602 kg/ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- additional 100 kg/ha at floweringe0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 602 kg/hae0
- Comparator
- 50 kg/ha was applied at plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only 50 kg/ha was applied at planting; an additional 100 kg/ha at flowering increased grain yield by 602 kg/ha”
t0“wheat”
Claim · model-written summary
More than 200 kg/ha planting N was required for premium wheat protein.
- Taxon
- wheatTriticum aestivume0
- Outcome
- protein contente0
- Value
- above 11.4%e0
- Qualifier
- more than 200 kg/ha of Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“more than 200 kg/ha of N was needed to produce premium grade wheat (i.e. protein content above 11.4%)”
Claim · model-written summary
With 100 kg/ha planting N, 100 kg/ha boot N was needed for premium protein.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- protein contente0
- Value
- 100 kg/hae0
- Qualifier
- boot stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve this protein content where 100 kg/ha had been applied at planting an additional 100 kg/ha was needed at the boot stage or 50 kg/ha at flowering”
t0“wheat”
Claim · model-written summary
With 100 kg/ha planting N, 50 kg/ha flowering N was needed for premium protein.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- protein contente0
- Value
- 50 kg/hae0
- Qualifier
- floweringe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“To achieve this protein content where 100 kg/ha had been applied at planting an additional 100 kg/ha was needed at the boot stage or 50 kg/ha at flowering”
t0“wheat”
Claim · model-written summary
Post flowering N up to 100 kg/ha left protein too low for premium payment.
- Taxon
- wheatTriticum aestivume0
- Treatment
- up to 100 kg/ha of additional Ne0
- Outcome
- protein contente0
- Direction
- too lowe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applied after flowering, up to 100 kg/ha of additional N produced wheat of a protein content too low to attract a premium payment”
Claim · model-written summary
Total N assimilation was similar with all N at planting or split through boot or flowering.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- quantity of N was assimilatede0
- Direction
- similare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A similar quantity of N was assimilated whether the entire N application was applied at planting or where the application was split between planting and boot or flowering”
t0“wheat”
Claim · model-written summary
Less N was assimilated when application was split after flowering.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- N was assimilatede0
- Direction
- Lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Less N was assimilated when the application was split between planting and after flowering”
t0“wheat”
Claim · model-written summary
Soil application at boot led to more N assimilation than foliar application.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- N was assimilatede0
- Direction
- Moree0
- Comparator
- foliar applicationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More N was assimilated from soil than from foliar applications at the boot stage”
t0“wheat”
Claim · model-written summary
Soil and foliar applications at flowering were equally effective for assimilation and protein.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- amount of N assimilated as well as the grain protein contente0
- Direction
- equally effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil and foliar applications were equally effective at flowering in increasing the amount of N assimilated as well as the grain protein content”
t0“wheat”
Claim · model-written summary
Foliar application was more effective after flowering.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- more effective methode0
- Direction
- more effectivee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after flowering foliar application was the more effective method”
t0“wheat”
Claim · model-written summary
Flowering N for protein was judged commercially unattractive.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- not an attractive commercial practicee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of N at flowering to increase the protein content of this semi-dwarf cultivar is not an attractive commercial practice”
t0“wheat”
Claim · model-written summary
Recent premium price ratio was below that needed to justify splitting N for protein.
- Taxon
- wheatTriticum aestivume0
- Outcome
- price ratioe0
- Direction
- less thane0
- Value
- <1.071e0
- Comparator
- that needede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The price ratio of premium to Australian Standard White wheat in recent years (<1.071 ) is less than that needed (1.0954-1.3013) to justify splitting the N application to lift grain protein content above 11.4% at the expense of yield”
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See all 2,061 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.