Abstract
A field experiment was conducted during winter season of 2005–06 and 2006–07 to evaluate the effect of nitrogen levels and weed control on weed growth, productivity and economics of wheat. The treatments comprised of 4 levels of nitrogen, viz. 0, 40, 80, and 120 kg/ha in main plots and 5 weed control methods, viz. weedy control, 2,4-D Na 0.75 kg/ha as post-emergence, isoproturon 1.0 kg/ha as post-emergence, isoproturon 1.0 kg/ha + 2,4-D Na 0.75 kg/ha as post-emergence and weeding by Dutch hoe at 15, 30 and 45 days after sowing. Maximum density and dry weight were recorded with 120 kg N/ha and minimum under N0. Increasing levels of nitrogen from 0 to 40, 40 to 80 and 80 to 120 kg/ha increased weed density by 33.7, 39.9 and 47.3% and weed dry matter by 35.2, 24.9 and 13.5%, respectively while N up take by 68.8, 56.7 and 18.7% phosphorus 13.2, 4.6 and 4.4% and potassium 16.2, 7.0 and 8.7% over preceding lower levels. 120 kg N/ha recorded significantly higher grain (2.90 t/ha) and straw (4.6 t/ha) yield, net return ( 26,616/ha) and B:C ratio (1.52).
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 11
Claim · model-written summary
Weed density was greatest at 120 kg N/ha and least with N0.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- 120 kg N/hae0
- Outcome
- Maximum densitye0
- Direction
- Maximume0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum density and dry weight were recorded with 120 kg N/ha and minimum under N0”
e1“weed growth”
t0“wheat”
Claim · model-written summary
Weed dry weight was greatest at 120 kg N/ha and least with N0.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 120 kg N/hae0
- Outcome
- dry weighte0
- Direction
- Maximume0
- Comparator
- N0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximum density and dry weight were recorded with 120 kg N/ha and minimum under N0”
e1“weed growth”
t0“wheat”
Claim · model-written summary
Successive nitrogen increases raised weed density by 33.7%, 39.9%, and 47.3%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Increasing levels of nitrogen from 0 to 40, 40 to 80 and 80 to 120 kg/hae0
- Interactor
- weede0weed
- Outcome
- weed densitye0
- Direction
- increasede0
- Value
- 33.7, 39.9 and 47.3%e0
- Comparator
- preceding lower levelse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing levels of nitrogen from 0 to 40, 40 to 80 and 80 to 120 kg/ha increased weed density by 33.7, 39.9 and 47.3%”
e1“over preceding lower levels”
t0“wheat”
Claim · model-written summary
Successive nitrogen increases raised weed dry matter by 35.2%, 24.9%, and 13.5%.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Increasing levels of nitrogene1
- Interactor
- weede0weed
- Outcome
- weed dry mattere0
- Direction
- increaseinferrede0
- Value
- 35.2, 24.9 and 13.5%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“weed dry matter by 35.2, 24.9 and 13.5%, respectively while N up take”
e1“Increasing levels of nitrogen from 0 to 40, 40 to 80 and 80 to 120 kg/ha”
t0“wheat”
Claim · model-written summary
Nitrogen uptake rose by 68.8%, 56.7%, and 18.7% across successive nitrogen increments.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- N up takee0
- Direction
- increaseinferrede0
- Value
- 68.8, 56.7 and 18.7%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N up take by 68.8, 56.7 and 18.7%”
t0“wheat”
Claim · model-written summary
Phosphorus uptake rose by 13.2%, 4.6%, and 4.4%.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- phosphoruse0
- Direction
- increaseinferrede0
- Value
- 13.2, 4.6 and 4.4%e0
Not reportedTreatmentComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phosphorus 13.2, 4.6 and 4.4%”
t0“wheat”
Claim · model-written summary
Potassium uptake rose by 16.2%, 7.0%, and 8.7%.
- Taxon
- wheatTriticum aestivumt0
- Outcome
- potassiume0
- Direction
- increaseinferrede0
- Value
- 16.2, 7.0 and 8.7%e0
- Comparator
- preceding lower levelse0
Not reportedTreatment
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“potassium 16.2, 7.0 and 8.7% over preceding lower levels”
t0“wheat”
Claim · model-written summary
The 120 kg N/ha treatment gave significantly higher grain yield of 2.90 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N/ha recorded significantly higher grain (2.90 t/ha) and straw (4.6 t/ha) yield”
t0“wheat”
Claim · model-written summary
The 120 kg N/ha treatment gave significantly higher straw yield of 4.6 t/ha.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N/ha recorded significantly higher grain (2.90 t/ha) and straw (4.6 t/ha) yield”
t0“wheat”
Claim · model-written summary
The 120 kg N/ha treatment gave a significantly higher net return of 26,616/ha.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- 120 kg N/hae0
- Outcome
- net returne0
- Direction
- highere0
- Value
- 26,616/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N/ha recorded significantly higher grain (2.90 t/ha) and straw (4.6 t/ha) yield, net return ( 26,616/ha)”
t0“wheat”
Claim · model-written summary
The 120 kg N/ha treatment gave a significantly higher benefit to cost ratio of 1.52.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“120 kg N/ha recorded significantly higher grain (2.90 t/ha) and straw (4.6 t/ha) yield, net return ( 26,616/ha) and B:C ratio (1.52)”
t0“wheat”
The same questions in other papers
nitrogen · weed · Triticum aestivum (wheat)Positive and negative results
13 papers in the same direction as this paper · 27 in the opposite direction
- positive
- positive
- positive
37 papers more in this group
See all 41 papers →nitrogen · growth · Triticum aestivum (wheat)Positive and negative results
124 papers in the same direction as this paper · 426 in the opposite direction
- positive
- positive
- positive
547 papers more in this group
See all 551 papers →nitrogen · yield · Triticum aestivum (wheat)Positive and negative results
1,736 papers in the same direction as this paper · 285 in the opposite direction · 39 reporting no difference from an alternative
- positive
- negative
- negative
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.