Abstract
A field experiment was conducted on a Casa Grande sandy loam at the Maricopa Agricultural Center to 1) determine the optimum rates of late season N needed to achieve optimum yield and quality of irrigated dumm wheat in conjunction with varying rates of early season N, and 2) to evaluate the usefulness of stem NO₃⁻N analysis in predicting the late season N rates which optimize grain production but minimize the potential for nitrate pollution of groundwater. The application of 80, 195 and 350 lbs. N/a during vegetative growth resulted in wheat with deficient, sufficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis. The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheat resulted in grain protein levels above 14% but had little effect on grain yield. Applications of N at heading to wheat which had previously received excessive N did not affect grain yield or quality. The use of stem NO₃⁻N analysis appears to be a useful tool in predicting the minimum N rate to be applied during the early reproductive period to insure acceptable levels of grain protein at harvest.
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 9
Claim · model-written summary
Early 80 lbs. N/a produced deficient wheat nitrogen status.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- 80e0
- Outcome
- deficiente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 80, 195 and 350 lbs. N/a during vegetative growth resulted in wheat with deficient, sufficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis”
Claim · model-written summary
Early 195 lbs. N/a produced sufficient wheat nitrogen status.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 195e0
- Outcome
- sufficiente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 80, 195 and 350 lbs. N/a during vegetative growth resulted in wheat with deficient, sufficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis”
Claim · model-written summary
Early 350 lbs. N/a produced excessive wheat nitrogen status.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 350 lbs. N/ae0
- Outcome
- excessive N statuse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 80, 195 and 350 lbs. N/a during vegetative growth resulted in wheat with deficient, sufficient and excessive N status at the boot stage as indicated by stem NO₃⁻N analysis”
Claim · model-written summary
Heading nitrogen in deficient wheat yielded grain protein above 14%.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 60 lbs. N/a at headinge0
- Outcome
- grain protein levelse0
- Direction
- abovee0
- Value
- 14%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheat resulted in grain protein levels above 14% but had little effect on grain yield”
Claim · model-written summary
Heading nitrogen in sufficient wheat yielded grain protein above 14%.
- Taxon
- wheatTriticum aestivume0
- Treatment
- 15 lbs. N/ae0
- Outcome
- grain protein levelse0
- Direction
- abovee0
- Value
- 14%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheat resulted in grain protein levels above 14% but had little effect on grain yield”
Claim · model-written summary
These heading nitrogen applications had little effect on grain yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheate0
- Outcome
- grain yielde0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of 60 lbs. N/a at heading to N-deficient wheat and 15 lbs. N/a to N-sufficient wheat resulted in grain protein levels above 14% but had little effect on grain yield”
Claim · model-written summary
Heading nitrogen did not affect grain yield after excessive early nitrogen.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Applications of N at headinge0
- Outcome
- grain yielde0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of N at heading to wheat which had previously received excessive N did not affect grain yield or quality”
Claim · model-written summary
Heading nitrogen did not affect grain quality after excessive early nitrogen.
- Taxon
- wheatTriticum aestivume0
- Treatment
- Applications of N at headinge0
- Outcome
- qualitye0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applications of N at heading to wheat which had previously received excessive N did not affect grain yield or quality”
Claim · model-written summary
Stem nitrate analysis appeared useful for predicting minimum nitrogen to secure grain protein.
- Outcome
- predicting the minimum N ratee0
Not reportedComparatorValue
Verbatim
e0“The use of stem NO₃⁻N analysis appears to be a useful tool in predicting the minimum N rate to be applied during the early reproductive period to insure acceptable levels of grain protein at harvest”
The same questions in other papers
nitrogen · molecular: expression · Triticum aestivum (wheat)Positive and negative results
25 papers in the same direction as this paper · 11 in the opposite direction
- negative
- positive
- no effect
33 papers more in this group
See all 37 papers →nitrogen · nutrient: content · Triticum aestivum (wheat)Positive and negative results
68 papers in the same direction as this paper · 410 in the opposite direction
- positive
- positive
- positive
475 papers more in this group
See all 479 papers →nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
323 papers in the same direction as this paper · 1,737 in the opposite direction
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- positive
- positive
2,057 papers more in this group
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.