Abstract
Maize is an excellent source of energy in human diet and animal rations. To find out the cumulative effect of nitrogen (N) and herbicidal weed control upon the various growth parameters of maize, an experiment was con ducted in summer season of 2006 at the Malakandher Research Farm, Agricultural, University Peshawar. The experiment was performed using randomized complete block design having split plot arrangements. All the treatments were replicated four times. The treatments consisting 3 N fertilizer (Urea) rates (i.e. 80, 120 and 160 kg ha -1 ) and 3 herbicides (Atrazine @ 1.00 kg a.i ha -1 , Stomp@ 0.75 kg a.i ha -1 and 2,4-D @ 0.80 kg a.i ha -1 ) and a weedy check was kept along each treatment for comparison. The main-plots having the N rates while the sub -plots having the herbicides. The N fertilizer was applied in two split doses (i.e. the first dose at the first irrigation after seed germination and the second dose a week before the silking). The pre -emergent herbicides(Stomp and Atrazine) were applied during sowing and the post emergent herbicide (2,4-D) was applied after 25 days of sowing. Fresh weed biomass waslower (34.0g m -2 )in the atrazine treated plots than in the weedy check plots (54.2g m -2 ).The maximum daysto 50% tasseling (61.6) taken by the plants fertilized with 160 kg ha -1 N and plants which received 80 and 120 kg ha -1 N had spent statistically similar days to 50% tasseling .The effect of herbicides and their interaction with N rates was non -significant . The maximum 500 kernel weight (92.8 and 90.2 g) was achieved in the plots which received 160 and 120 kg ha -1 N, respectively. The heaviest 500 kernel weight (91.5 g) was noted in Atrazine treated plots and lightest 500 kernel weight (85.8 g) was found inweedy check plots. The largest biological yield (3.1 t ha -1 ) wasrecordedfor 160 kg ha -1 . The maximum biological yield (3.2 t ha -1 ) was found for Atrazine while the lowest (2.4 t ha -1 ) for weedy check. The overall effect of 160 kg ha -1 N application rate and Atrazine wasfoundto be highly desirable for weed control and for promoting yield and yield components of maize.
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Claims 11
Claim · model-written summary
Atrazine plots had lower fresh weed biomass, 34.0g m -2 versus 54.2g m -2 in weedy checks.
- Treatment
- atrazine treated plotse0
- Interactor
- weede0weed
- Outcome
- Fresh weed biomasse0
- Direction
- waslowere0
- Value
- 34.0g m -2e0
- Qualifier
- 54.2g m -2e0
- Comparator
- weedy check plotse0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fresh weed biomass waslower (34.0g m -2 )in the atrazine treated plots than in the weedy check plots (54.2g m -2 )”
t0“maize”
Claim · model-written summary
At 160 kg ha -1 N, days to 50% tasseling were maximal at 61.6.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum daysto 50% tasseling (61.6) taken by the plants fertilized with 160 kg ha -1 N”
t0“maize”
Claim · model-written summary
The 80 and 120 kg ha -1 N treatments had statistically similar days to 50% tasseling.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants which received 80 and 120 kg ha -1 N had spent statistically similar days to 50% tasseling”
t0“maize”
Claim · model-written summary
Herbicide effects and interactions with nitrogen rates on tasseling time were nonsignificant.
- Treatment
- herbicidese0
- Outcome
- effect of herbicides and their interaction with N ratese0
- Direction
- non -significante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of herbicides and their interaction with N rates was non -significant”
t0“maize”
Claim · model-written summary
The 120 kg ha -1 N plots reached 90.2 g for 500 kernel weight.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum 500 kernel weight (92.8 and 90.2 g) was achieved in the plots which received 160 and 120 kg ha -1 N, respectively”
t0“maize”
Claim · model-written summary
Atrazine plots had the heaviest 500 kernel weight, 91.5 g.
- Treatment
- Atrazine treated plotse0
- Outcome
- 500 kernel weighte0
- Direction
- heavieste0
- Value
- 91.5 ge0
- Qualifier
- 85.8 ge0
- Comparator
- weedy check plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The heaviest 500 kernel weight (91.5 g) was noted in Atrazine treated plots and lightest 500 kernel weight (85.8 g) was found inweedy check plots”
t0“maize”
Claim · model-written summary
Weedy check plots had the lightest 500 kernel weight, 85.8 g.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lightest 500 kernel weight (85.8 g) was found inweedy check plots”
t0“maize”
Claim · model-written summary
The 160 kg ha -1 N rate produced the largest biological yield, 3.1 t ha -1.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The largest biological yield (3.1 t ha -1 ) wasrecordedfor 160 kg ha -1”
t0“maize”
Claim · model-written summary
Atrazine produced the maximum biological yield, 3.2 t ha -1.
- Treatment
- Atrazinee0
- Outcome
- biological yielde0
- Direction
- maximume0
- Value
- 3.2 t ha -1e0
- Qualifier
- 2.4 t ha -1e0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum biological yield (3.2 t ha -1 ) was found for Atrazine while the lowest (2.4 t ha -1 ) for weedy check”
t0“maize”
Claim · model-written summary
The weedy check produced the lowest biological yield, 2.4 t ha -1.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum biological yield (3.2 t ha -1 ) was found for Atrazine while the lowest (2.4 t ha -1 ) for weedy check”
t0“maize”
Claim · model-written summary
The authors judged 160 kg ha -1 N and Atrazine desirable for weed control and maize yield.
- Outcome
- 160 kg ha -1 N application rate and Atrazine wasfoundto be highly desirable for weed control and for promoting yield and yield componentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The overall effect of 160 kg ha -1 N application rate and Atrazine wasfoundto be highly desirable for weed control and for promoting yield and yield components of maize”
The same questions in other papers
atrazine · weed · Zea mays (maize)Results differ
196 papers in the same direction as this paper · 5 in the opposite direction
- positive
- negative
- negative
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See all 202 papers →atrazine · yield · Zea mays (maize)Results differ
204 papers in the same direction as this paper · 29 in the opposite direction · 6 reporting no difference from an alternative
- positive
- positive
- negative
236 papers more in this group
See all 240 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.