Abstract
Abstract Information on response of soybean [ Glycine max (L.) Merr.] cultivars to reduced tillage systems in northern dryland areas is limited. A 4‐yr field study (1984 to 1987) was conducted to evaluate the effect of tillage system, weed control method, and cultivar maturity on soybean seed yield variables. An early and a late‐maturing soybean cultivar were grown on a Fargo clay (fine, montmorillonitic frigid Vertic Haplaquoll) on established tillage plots. Tillage systems included conventional (moldboard plow) and three reduced tillage systems (sweep, intertill, and no‐till) with herbicides or herbicides plus cultivation for weed control. Climatic conditions resulted in differences among years in seed yield, seed weight, seed moisture, seed oil concentration, and seed oil yield. These seed variables were not significantly influenced by tillage system, weed control method, or cultivar maturity when grown in rotation with barley ( Hordeum vulgare L.), but showed significant interactions. Cultivation for weed control depressed seed yield and weight of only the early cultivar. Early plant water stress (June and July) lowered yield of the early cultivar more than the late cultivar. Early cultivar no‐till yields (1240 kg ha −1 ) were greater than tilled system yields (average 1070 kg ha −1 ), while late cultivar yields were similar among systems (average 1420 kg ha −1 ). An early maturing cultivar performed similarly to a late‐maturing cultivar irrespective of tillage system unless early plant water stress was encountered. Fall application of granular herbicide provided good weed control, but cultivation for weed control was not beneficial for the yields parameters measured.
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Claims 10
Claim · model-written summary
Climatic differences between years affected five soybean seed traits.
- Taxon
- Soybean
Glycine maxt0 - Outcome
- seed yield, seed weight, seed moisturee0
- Direction
- differencese0
- Setting
- yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Climatic conditions resulted in differences among years in seed yield, seed weight, seed moisture, seed oil concentration, and seed oil yield”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Tillage, weed control and maturity did not significantly affect the measured seed variables in barley rotation.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- tillage system, weed control method, or cultivar maturitye0
- Interactor
- barley
.jpg?width=60)
Hordeum vulgaree0other - Outcome
- seed variablese0
- Direction
- not significantly influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“These seed variables were not significantly influenced by tillage system, weed control method, or cultivar maturity when grown in rotation with barley ( Hordeum vulgare L.), but showed significant interactions”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
The seed variables showed significant interactions among tested factors.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Reduced Tillage Systemst0
- Outcome
- significant interactionse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but showed significant interactions”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Cultivation for weed control lowered early cultivar seed yield and weight.
- Taxon
- SoybeanGlycine maxt0
- Material
- early cultivare0
- Treatment
- Cultivation for weed controle0
- Outcome
- seed yield and weighte0
- Direction
- depressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivation for weed control depressed seed yield and weight of only the early cultivar”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Early season water stress lowered early cultivar yield more than late cultivar yield.
- Taxon
- SoybeanGlycine maxt0
- Material
- early cultivare0
- Treatment
- Early plant water stress (June and July)e0
- Outcome
- yield of the early cultivare0
- Direction
- lowerede0
- Comparator
- late cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early plant water stress (June and July) lowered yield of the early cultivar more than the late cultivar”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Early cultivar no-till yield was 1240 kg ha −1, above tilled systems averaging 1070 kg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- Early cultivare0
- Treatment
- no‐tille0
- Outcome
- yieldse0
- Direction
- greater thane0
- Value
- 1240 kg ha −1e0
- Qualifier
- average 1070 kg ha −1e0
- Comparator
- tilled systeme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Early cultivar no‐till yields (1240 kg ha −1 ) were greater than tilled system yields (average 1070 kg ha −1 )”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Late cultivar yield was similar across tillage systems, averaging 1420 kg ha −1.
- Taxon
- SoybeanGlycine maxt0
- Material
- late cultivare0
- Outcome
- yieldse0
- Direction
- similare0
- Value
- 1420 kg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“late cultivar yields were similar among systems (average 1420 kg ha −1 )”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Early and late cultivar performance was similar across tillage systems except under early water stress.
- Taxon
- SoybeanGlycine maxt0
- Material
- early maturing cultivare0
- Outcome
- performed similarlye0
- Qualifier
- unless early plant water stress was encounterede0
- Comparator
- late‐maturing cultivare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An early maturing cultivar performed similarly to a late‐maturing cultivar irrespective of tillage system unless early plant water stress was encountered”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Fall granular herbicide application gave good weed control.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- Fall application of granular herbicidee0
- Outcome
- weed controle0
- Direction
- goode0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fall application of granular herbicide provided good weed control”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
Claim · model-written summary
Cultivation for weed control did not benefit the measured yield parameters.
- Taxon
- SoybeanGlycine maxt0
- Treatment
- cultivation for weed controle0
- Outcome
- yields parameters measurede0
- Direction
- not beneficiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cultivation for weed control was not beneficial for the yields parameters measured”
t0“Soybean Cultivar Response to Reduced Tillage Systems in Northern Dryland Areas”
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See all 460 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.