Abstract
A semi-dwarf cultivar (WW 15) and a standard height Australian wheat variety (Timgalen) were grown at two nitrogen levels and under three irrigation regimes in the Murrumbidgee Irrigation Area. Numerous plant measurements were taken to determine which attributes were associated with the superior yield of semi-dwarf wheat in this environment. WW 15 yielded 42% more grain than Timgalen and nitrogen fertilizer increased the yield of both varieties. The irrigation treatments did not affect yield because rainfall was above average. Total dry matter production and leaf area of WW 15 were similar to those of Timgalen, but WW 15 put a much greater proportion of its dry matter into grain. A greater number of grains per spike was the yield component responsible for the higher yield of WW 15. The increase in grain yield with the addition of nitrogen fertilizer was due to a general improvement in all aspects of crop vigour (e.g. tiller density, leaf area, total dry matter). There was no interaction between cultivars and nitrogen rates in their effect on grain yield.
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Claims 8
Claim · model-written summary
WW 15 yielded 42% more grain than Timgalen.
- Taxon
- wheat
Triticum aestivumt0 - Material
- WW 15e0
- Outcome
- graine0
- Direction
- moree0
- Value
- 42%e0
- Comparator
- Timgalene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WW 15 yielded 42% more grain than Timgalen”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
Nitrogen fertilizer increased both wheat varieties’ yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- nitrogen fertilizere0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nitrogen fertilizer increased the yield of both varieties.”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
Irrigation treatments did not affect wheat yield in above-average rainfall.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- irrigation treatmentse0
- Outcome
- yielde0
- Direction
- did not affecte0
- Qualifier
- rainfall was above averagee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The irrigation treatments did not affect yield because rainfall was above average.”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
WW 15 and Timgalen had similar total dry matter and leaf area.
- Taxon
- wheatTriticum aestivumt0
- Material
- WW 15e0
- Outcome
- Total dry matter production and leaf areae0
- Direction
- similare0
- Comparator
- Timgalene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total dry matter production and leaf area of WW 15 were similar to those of Timgalen”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
WW 15 allocated a greater share of dry matter to grain.
- Taxon
- wheatTriticum aestivumt0
- Material
- WW 15e0
- Outcome
- proportion of its dry matter into graine0
- Direction
- greatere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“WW 15 put a much greater proportion of its dry matter into grain.”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
Greater grains per spike accounted for WW 15’s higher yield.
- Taxon
- wheatTriticum aestivumt0
- Material
- WW 15e0
- Outcome
- higher yielde0
- Qualifier
- greater number of grains per spikee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A greater number of grains per spike was the yield component responsible for the higher yield of WW 15.”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
Nitrogen increased grain yield through improved crop vigour.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- nitrogen fertilizere0
- Outcome
- grain yielde0
- Qualifier
- general improvement in all aspects of crop vigoure0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in grain yield with the addition of nitrogen fertilizer was due to a general improvement in all aspects of crop vigour (e.g. tiller density, leaf area, total dry matter).”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
Claim · model-written summary
Cultivar and nitrogen rate did not interact in their effect on grain yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- nitrogen ratese0
- Outcome
- grain yielde0
- Direction
- no interactione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no interaction between cultivars and nitrogen rates in their effect on grain yield.”
t0“Growth and yield of a semi-dwarf and a standard height wheat cultivar in the Murrumbidgee Irrigation Area”
The same questions in other papers
irrigation · yield · Triticum aestivum (wheat)Positive and negative results
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- positive
- positive
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See all 989 papers →fertilization · yield · Triticum aestivum (wheat)Positive and negative results
3,114 papers in the same direction as this paper · 284 in the opposite direction · 39 reporting no difference from an alternative
- no effect
- negative
- negative
3,434 papers more in this group
See all 3,438 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.