Abstract
A field experiment was conducted during the rabi 2004–05 and 2005–06 to study the effect of planting pattern and weed conrol practices on weed dynamics and productivity of sweet corn. Planting pattern of 60 x 20 cm with 83,333 plants/ha proved to be very effective in suppressing weeds, recording the lowest density of grasses, sedges and broad-leaved weeds at 30 and 45 days after sowing (DAS). At harvest also, it resulted in the lowest total weed density, weed dry weight with the highest weed control efficiency (WCE) and was at par with 75 x 16 cm. These two planting patterns were found to be significantly superior to 60 x 25 cm and 75 x 20 cm with 66,666 plants/ha. Though the highest cob length and green cob weight of sweet corn were realized with 60 x 25 cm, the green cob (13.9 and 13.2 t/ha) and green fodder yield (17.6 and 16.6 t/ha) were found to be the highest with 60 x 20 cm and resulted in higher net returns (Rs. 24, 987 and 23,024/ha). Pre-emergence application of atrazine @ 1 kg/ha followed by (fb) hand weeding at 30 DAS provided significant weed control during the citical crop-weed competition period in sweet corn upto 45 DAS. It also recorded the lowest total weed density and dry weight with the highest weed control efficiency at harvest, which resulted in the highest green cob yield (14.2 and 13.4 t/ha) and green fodder yield (18.0 and 17.1 t/ha) of sweet corn with enhanced net returns (Rs. 25,251 and 23,221/ha) and B: C ratio, though at par with two hand weedings at 15 and 30 DAS and pre-emergence application of atrazine @ 1 kg/ha fb post-emergence application of paraquat @ 0.5 kg/ha at 30 DAS. Uncontrolled weed growth throughout the crop growth period reduced the green cob yield to an extent to 40–42% during both the years of experiment.
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Claims 7
Claim · model-written summary
The 60 x 20 cm pattern yielded the lowest weed density at 30 and 45 DAS.
- Taxon
- sweet cornt0
- Treatment
- 60 x 20 cm with 83,333 plants/hae0
- Interactor
- weedse0weed
- Outcome
- density of grasses, sedges and broad-leaved weedse0
- Direction
- loweste0
Not reportedComparator
Verbatim
e0“Planting pattern of 60 x 20 cm with 83,333 plants/ha proved to be very effective in suppressing weeds, recording the lowest density of grasses, sedges and broad-leaved weeds at 30 and 45 days after sowing (DAS).”
t0“sweet corn (Zea mays L.)”
Claim · model-written summary
At harvest 60 x 20 cm had the lowest weed density and dry weight and highest weed control efficiency.
Verbatim
e0“At harvest also, it resulted in the lowest total weed density, weed dry weight with the highest weed control efficiency (WCE) and was at par with 75 x 16 cm.”
e1“Planting pattern of 60 x 20 cm with 83,333 plants/ha”
t0“sweet corn (Zea mays L.)”
Claim · model-written summary
The 60 x 25 cm pattern had the highest cob length and green cob weight.
Not reportedComparator
Verbatim
e0“the highest cob length and green cob weight of sweet corn were realized with 60 x 25 cm”
Claim · model-written summary
The 60 x 20 cm pattern had the highest green cob yield at 13.9 and 13.2 t/ha.
Not reportedComparator
Verbatim
e0“the green cob (13.9 and 13.2 t/ha) and green fodder yield (17.6 and 16.6 t/ha) were found to be the highest with 60 x 20 cm”
t0“sweet corn (Zea mays L.)”
Claim · model-written summary
The 60 x 20 cm pattern had the highest green fodder yield at 17.6 and 16.6 t/ha.
- Taxon
- sweet cornt0
- Treatment
- 60 x 20 cme0
- Outcome
- green fodder yielde0
- Direction
- higheste0
- Value
- 17.6 and 16.6 t/hae0
Not reportedComparator
Verbatim
e0“green fodder yield (17.6 and 16.6 t/ha) were found to be the highest with 60 x 20 cm”
t0“sweet corn (Zea mays L.)”
Claim · model-written summary
Atrazine followed by hand weeding gave significant weed control through 45 DAS.
- Taxon
- sweet corne0
- Treatment
- atrazine @ 1 kg/ha followed by (fb) hand weeding at 30 DASe0
- Interactor
- weede0weed
- Outcome
- weed controle0
Not reportedComparatorDirection
Verbatim
e0“Pre-emergence application of atrazine @ 1 kg/ha followed by (fb) hand weeding at 30 DAS provided significant weed control during the citical crop-weed competition period in sweet corn upto 45 DAS.”
Claim · model-written summary
Uncontrolled weeds reduced green cob yield by 40–42%.
- Taxon
- sweet cornt0
- Treatment
- Uncontrolled weed growthe0
- Interactor
- weede0weed
- Outcome
- green cob yielde0
- Direction
- reducede0
- Value
- 40–42%e0
Not reportedComparator
Verbatim
e0“Uncontrolled weed growth throughout the crop growth period reduced the green cob yield to an extent to 40–42% during both the years of experiment.”
t0“sweet corn (Zea mays L.)”
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