Abstract
A field experiment was conducted at Jabalpur, Madhya Pradesh, during the winter seasons of 1996–97 and 1997–98, to find out the effect of nitrogen, planting geometry and herbicides on weed dynamics, yield and nutrient uptake in Indian mustard [Brassica juneea (L.) Czernj. & Cosson]. Treatments comprised combinations of 4 N levels (0,40,80 and 120 kg/ha) and 2 planting geometry (uni-and bi-direction) in main plots, 2 herbicides, viz. Isoproturon 1.0 kg and Oxadiazon 0.75 kg/ha, as pre-emergence were compared with hand-weeding 30 days after sowing and weedy check in subplots. Weed population declined, whereas weed dry matter increased with advancement in age of the crop. Increasing levels of nitrogen and change in planting geometry did not influence the weed population, whereas weed dry matter at harvest declined significantly at 120 kg N/hg compared with no nitrogen application. Seed yield and nutrient uptake also increased significantly at 120 kg N/ha. Both the herbicides significantly increased the nutrient uptake by checking the weed growth compared to weedy check. Isoproturon being at par to oxadiazon resulted in the highest seed yield. Application of 120 kg N/hg and Isoproturon gave the highest net return and benefit: cost ratio.
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Claims 13
Claim · model-written summary
Weed population declined as the mustard crop aged.
Verbatim
e0“Weed population declined, whereas weed dry matter increased with advancement in age of the crop.”
Claim · model-written summary
Weed dry matter increased as the mustard crop aged.
Verbatim
e0“Weed population declined, whereas weed dry matter increased with advancement in age of the crop.”
Claim · model-written summary
Increasing nitrogen did not influence weed population.
- Taxon
- weede0
- Treatment
- Increasing levels of nitrogene0
- Outcome
- weed populatione0
- Direction
- did not influencee0
Not reportedComparator
Verbatim
e0“Increasing levels of nitrogen and change in planting geometry did not influence the weed population”
Claim · model-written summary
Changing planting geometry did not influence weed population.
- Taxon
- weede0
- Treatment
- change in planting geometrye0
- Outcome
- weed populatione0
- Direction
- did not influencee0
Not reportedComparator
Verbatim
e0“Increasing levels of nitrogen and change in planting geometry did not influence the weed population”
Claim · model-written summary
At 120 kg N/hg, weed dry matter at harvest declined significantly compared with no nitrogen.
Verbatim
e0“weed dry matter at harvest declined significantly at 120 kg N/hg compared with no nitrogen application.”
Claim · model-written summary
Seed yield and nutrient uptake increased significantly at 120 kg N/ha.
- Taxon
- Indian mustard
Brassica junceat0 - Treatment
- 120 kg N/hae0
- Outcome
- Seed yield and nutrient uptakee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seed yield and nutrient uptake also increased significantly at 120 kg N/ha.”
t0“Indian mustard”
Claim · model-written summary
Isoproturon significantly increased nutrient uptake compared with weedy check by checking weed growth.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- Isoproturon 1.0 kge1
- Interactor
- weede0weed
- Outcome
- nutrient uptakee0
- Direction
- increasede0
- Qualifier
- by checking the weed growthe0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the herbicides significantly increased the nutrient uptake by checking the weed growth compared to weedy check.”
e1“Isoproturon 1.0 kg and Oxadiazon 0.75 kg/ha, as pre-emergence”
t0“Indian mustard”
Claim · model-written summary
Oxadiazon significantly increased nutrient uptake compared with weedy check by checking weed growth.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- Oxadiazon 0.75 kg/hae1
- Interactor
- weede0weed
- Outcome
- nutrient uptakee0
- Direction
- increasede0
- Qualifier
- by checking the weed growthe0
- Comparator
- weedy checke0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both the herbicides significantly increased the nutrient uptake by checking the weed growth compared to weedy check.”
e1“Isoproturon 1.0 kg and Oxadiazon 0.75 kg/ha, as pre-emergence”
t0“Indian mustard”
Claim · model-written summary
Isoproturon produced the highest seed yield and was at par with oxadiazon.
- Taxon
- Indian mustardBrassica junceat0
- Treatment
- Isoproturone0
- Outcome
- seed yielde0
- Direction
- higheste0
- Qualifier
- at pare0
- Comparator
- oxadiazone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Isoproturon being at par to oxadiazon resulted in the highest seed yield.”
t0“Indian mustard”
Claim · model-written summary
Application of 120 kg N/hg gave the highest net return.
Not reportedTaxonComparator
Verbatim
e0“Application of 120 kg N/hg and Isoproturon gave the highest net return and benefit: cost ratio.”
Claim · model-written summary
Application of 120 kg N/hg gave the highest benefit: cost ratio.
Not reportedTaxonComparator
Verbatim
e0“Application of 120 kg N/hg and Isoproturon gave the highest net return and benefit: cost ratio.”
Claim · model-written summary
Isoproturon gave the highest net return.
Not reportedTaxonComparator
Verbatim
e0“Application of 120 kg N/hg and Isoproturon gave the highest net return and benefit: cost ratio.”
Claim · model-written summary
Isoproturon gave the highest benefit: cost ratio.
Not reportedTaxonComparator
Verbatim
e0“Application of 120 kg N/hg and Isoproturon gave the highest net return and benefit: cost ratio.”
The same questions in other papers
Oxadiazon · nutrient: content · Brassica juncea (Indian mustard)Results agree
1 paper in the same direction as this paper
- positive
isoproturon · yield · Brassica juncea (Indian mustard)Results agree
7 papers in the same direction as this paper
- positive
- positive
- positive
4 papers more in this group
See all 8 papers →nitrogen · yield · Brassica juncea (Indian mustard)Results differ
62 papers in the same direction as this paper · 2 in the opposite direction
- negative
- negative
- positive
61 papers more in this group
See all 65 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.