Abstract
A survey of experimental results relating crop management to grain yield was conducted for wheat and other crops on duplex and non-duplex soils in the wheatbelt of Western Australia. Increases in grain yield of wheat due to improved agronomic practices on duplex soils were almost as great as on other soils. Early sowing improved yield more on duplex soils than on other soils, but the response to applied nitrogen was more variable, possibly related to the reduced efficiency of uptake of applied nitrogen. The yield advantage for a semi-dwarf cultivar (Aroona) over a tall cultivar (Garnenya) was less (6%) on duplex soils than on other soils (29%). The optimum seed rate was 27% greater on duplex than on other soils. Increases in both grain yield and grain quality due to the application of potassium were large on 1 duplex soil. Water use efficiency in grain production was similar on duplex and other soils where seasonal water use did not exceed about 350 mm. At 1 location in the eastern wheatbelt, yields of wheat, barley, lupins and peas grown on a duplex soil were compared with yields on 2 other soils. Wheat was the most productive crop on the duplex soil, while barley yielded most on the other soils. All crops, except lupins, yielded less on the duplex soil. Experiments with 2 lupin cultivars grown on duplex and other soils on the south coast of Western Australia (average growing season rainfall >300 mm) showed that both cultivars yielded less on duplex soils, but 1 cultivar required slightly fewer plants to achieve its maximum yield on the duplex soils. This survey of experimental results in Western Australia shows that duplex soils are no less productive than other soils when results are averaged over all crops and locations. We conclude, however, that different management practices may be required to improve yields on duplex compared with other soils.
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Claims 16
Claim · model-written summary
Increases in wheat grain yield from improved agronomic practices on duplex soils were almost as great as on other soils.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- improved agronomic practicese0
- Outcome
- grain yielde0
- Direction
- Increasese0
- Comparator
- other soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in grain yield of wheat due to improved agronomic practices on duplex soils were almost as great as on other soils”
Claim · model-written summary
Early sowing improved wheat yield more on duplex soils than on other soils.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Early sowinge0
- Outcome
- yielde0
- Direction
- improvede0
- Comparator
- other soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early sowing improved yield more on duplex soils than on other soils”
t0“wheat”
Claim · model-written summary
The wheat response to applied nitrogen was more variable on duplex soils.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- applied nitrogene0
- Outcome
- response to applied nitrogene0
- Direction
- more variablee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the response to applied nitrogen was more variable”
t0“wheat”
Claim · model-written summary
The more variable nitrogen response is possibly related to reduced efficiency of uptake of applied nitrogen.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- uptake of applied nitrogene0
- Qualifier
- reduced efficiencye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“possibly related to the reduced efficiency of uptake of applied nitrogen”
t0“wheat”
Claim · model-written summary
The yield advantage of the semi-dwarf cultivar Aroona over the tall cultivar Garnenya was 6% on duplex soils.
- Taxon
- wheatTriticum aestivumt0
- Material
- Aroonae0
- Outcome
- yield advantagee0
- Direction
- lesse0
- Value
- 6%e0
- Comparator
- Garnenyae0
- Setting
- duplex soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield advantage for a semi-dwarf cultivar (Aroona) over a tall cultivar (Garnenya) was less (6%) on duplex soils than on other soils (29%)”
t0“wheat”
Claim · model-written summary
The yield advantage of the semi-dwarf cultivar Aroona over the tall cultivar Garnenya was 29% on other soils.
- Taxon
- wheatTriticum aestivumt0
- Material
- Aroonae0
- Outcome
- yield advantagee0
- Value
- 29%e0
- Comparator
- Garnenyae0
- Setting
- other soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield advantage for a semi-dwarf cultivar (Aroona) over a tall cultivar (Garnenya) was less (6%) on duplex soils than on other soils (29%)”
t0“wheat”
Claim · model-written summary
The optimum seed rate was 27% greater on duplex soils than on other soils.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- optimum seed ratee0
- Direction
- greatere0
- Value
- 27%e0
- Comparator
- other soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum seed rate was 27% greater on duplex than on other soils”
t0“wheat”
Claim · model-written summary
Potassium application gave large increases in grain yield and grain quality on one duplex soil.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- application of potassiume0
- Outcome
- grain yield and grain qualitye0
- Direction
- Increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in both grain yield and grain quality due to the application of potassium were large on 1 duplex soil”
t0“wheat”
Claim · model-written summary
Water use efficiency in grain production was similar on duplex and other soils where seasonal water use did not exceed about 350 mm.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- Water use efficiency in grain productione0
- Direction
- similare0
- Qualifier
- seasonal water use did not exceed about 350 mme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water use efficiency in grain production was similar on duplex and other soils where seasonal water use did not exceed about 350 mm”
t0“wheat”
Claim · model-written summary
At one eastern wheatbelt location, wheat was the most productive crop on the duplex soil.
- Taxon
- WheatTriticum aestivume0
- Outcome
- most productive crope0
- Setting
- duplex soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat was the most productive crop on the duplex soil”
Claim · model-written summary
At that location, barley yielded most on the other soils.
- Taxon
- barley
.jpg?width=60)
Hordeum vulgaree0 - Outcome
- yielded moste0
- Setting
- other soilse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“barley yielded most on the other soils”
Claim · model-written summary
All crops except lupins yielded less on the duplex soil than on the other soils.
Verbatim
e0“All crops, except lupins, yielded less on the duplex soil”
Claim · model-written summary
Both of 2 lupin cultivars yielded less on duplex soils on the south coast of Western Australia.
LupinusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments with 2 lupin cultivars”
e1“both cultivars yielded less on duplex soils”
Claim · model-written summary
One lupin cultivar required slightly fewer plants to achieve its maximum yield on the duplex soils.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Experiments with 2 lupin cultivars”
e1“1 cultivar required slightly fewer plants to achieve its maximum yield on the duplex soils”
Claim · model-written summary
Duplex soils are no less productive than other soils when results are averaged over all crops and locations.
Verbatim
e0“duplex soils are no less productive than other soils when results are averaged over all crops and locations”
Claim · model-written summary
Different management practices may be required to improve yields on duplex compared with other soils.
Verbatim
e0“different management practices may be required to improve yields on duplex compared with other soils”
e1“all crops”
The same questions in other papers
potassium · quality: grain · Triticum aestivum (wheat)Positive and negative results
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- no effect
- positive
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See all 8 papers →sowing time · yield · Triticum aestivum (wheat)Positive and negative results
265 papers in the same direction as this paper · 191 in the opposite direction · 5 reporting no difference from an alternative
- negative
- negative
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458 papers more in this group
See all 462 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.