Abstract
Spring wheat ( Triticum aestivum L.) production in the northern Great Plains generally utilizes conventional tillage systems. A 12‐yr study evaluated the effects of tillage system [conventional‐till (CT), minimum‐till (MT), and no‐till (NT)], N fertilizer rate (0, 22, and 45 kg N ha −1 ), and cultivar (Butte86 and Stoa) on spring wheat grain yields in a dryland spring wheat–fallow rotation (SW–F). Butte86 yields with CT exceeded NT yields in five out of 12 years with 0 and 22 kg N ha −1 applied, and four years with 45 kg N ha −1 applied. Stoa yields with CT exceeded NT yields in three out of 12 years with no N applied, four years with 22 kg N ha −1 applied, and only one year with 45 kg N ha −1 applied. Yields with NT exceeded those with CT in one year. Most years, yields with MT equaled those with CT. Responses to N tended to be greatest in years when spring soil NO 3 –N was lowest. Positive yield responses to N fertilization with CT occurred in three years with Butte86 and two years with Stoa; with MT, four years with Butte86 and two years with Stoa; and with NT, five years with Butte86 and three years with Stoa. Cultivars were not consistent in their response to tillage and N fertilization. These results indicate that farmers in the northern Great Plains can successfully produce spring wheat in a SW–F system using MT and NT systems, but yields may be slightly reduced when compared with CT systems some years.
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Claims 10
Claim · model-written summary
Butte86 yields under CT exceeded NT in five years at 0 and 22 kg N ha −1 and four years at 45 kg N ha −1.
- Taxon
- Spring Wheat
Triticum aestivumt0 - Material
- Butte86e0
- Treatment
- CTe0
- Outcome
- yieldse0
- Direction
- exceedede0
- Value
- five out of 12 yearse0
- Qualifier
- four years with 45 kg N ha −1 appliede0
- Comparator
- NTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Butte86 yields with CT exceeded NT yields in five out of 12 years with 0 and 22 kg N ha −1 applied, and four years with 45 kg N ha −1 applied”
t0“Spring Wheat”
Claim · model-written summary
Stoa yields under CT exceeded NT in three, four and one years at the respective nitrogen rates.
- Taxon
- Spring WheatTriticum aestivumt0
- Material
- Stoae0
- Treatment
- CTe0
- Outcome
- yieldse0
- Direction
- exceedede0
- Value
- three out of 12 yearse0
- Qualifier
- four years with 22 kg N ha −1 applied, and only one year with 45 kg N ha −1 appliede0
- Comparator
- NTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stoa yields with CT exceeded NT yields in three out of 12 years with no N applied, four years with 22 kg N ha −1 applied, and only one year with 45 kg N ha −1 applied”
t0“Spring Wheat”
Claim · model-written summary
NT yield exceeded CT in one year.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- NTe0
- Outcome
- Yieldse0
- Direction
- exceedede0
- Value
- one yeare0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields with NT exceeded those with CT in one year”
t0“Spring Wheat”
Claim · model-written summary
MT yields equaled CT in most years.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- MTe0
- Outcome
- yieldse0
- Direction
- equalede0
- Qualifier
- Most yearse0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Most years, yields with MT equaled those with CT”
t0“Spring Wheat”
Claim · model-written summary
Nitrogen responses tended to be greatest when spring soil nitrate was lowest.
- Taxon
- Spring WheatTriticum aestivumt0
- Outcome
- Responses to Ne0
- Direction
- greateste0
- Setting
- years when spring soil NO 3 –N was loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Responses to N tended to be greatest in years when spring soil NO 3 –N was lowest”
t0“Spring Wheat”
Claim · model-written summary
Positive nitrogen yield responses under CT occurred in three years for Butte86 and two for Stoa.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- N fertilization with CTe0
- Outcome
- yield responsese0
- Direction
- Positivee0
- Value
- three yearse0
- Qualifier
- two years with Stoae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Positive yield responses to N fertilization with CT occurred in three years with Butte86 and two years with Stoa”
t0“Spring Wheat”
Claim · model-written summary
Positive nitrogen yield responses under MT occurred in four years for Butte86 and two for Stoa.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- MTe0
- Outcome
- yield responsese1
- Direction
- Positivee1
- Value
- four yearse0
- Qualifier
- two years with Stoae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with MT, four years with Butte86 and two years with Stoa”
e1“Positive yield responses to N fertilization with CT occurred in three years with Butte86 and two years with Stoa; with MT, four years with Butte86 and two years with Stoa”
t0“Spring Wheat”
Claim · model-written summary
Positive nitrogen yield responses under NT occurred in five years for Butte86 and three for Stoa.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- NTe0
- Outcome
- yield responsese1
- Direction
- Positivee1
- Value
- five yearse0
- Qualifier
- three years with Stoae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with NT, five years with Butte86 and three years with Stoa”
e1“Positive yield responses to N fertilization with CT occurred in three years with Butte86 and two years with Stoa; with MT, four years with Butte86 and two years with Stoa; and with NT, five years with Butte86 and three years with Stoa”
t0“Spring Wheat”
Claim · model-written summary
Cultivar responses to tillage and nitrogen were inconsistent.
- Taxon
- Spring WheatTriticum aestivumt0
- Outcome
- response to tillage and N fertilizatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars were not consistent in their response to tillage and N fertilization”
t0“Spring Wheat”
Claim · model-written summary
Farmers can use MT and NT in spring wheat crop-fallow systems, though yields may sometimes be slightly reduced against CT.
- Taxon
- spring wheatTriticum aestivume0
- Outcome
- produce spring wheat in a SW–F system using MT and NT systemse0
- Qualifier
- yields may be slightly reduced when compared with CT systems some yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“farmers in the northern Great Plains can successfully produce spring wheat in a SW–F system using MT and NT systems, but yields may be slightly reduced when compared with CT systems some years”
The same questions in other papers
tillage · yield · Triticum aestivum (wheat)Positive and negative results
1,115 papers in the same direction as this paper · 257 in the opposite direction · 41 reporting no difference from an alternative
- no effect
- positive
- positive
1,410 papers more in this group
See all 1,414 papers →fertilization · yield · Triticum aestivum (wheat)Positive and negative results
3,114 papers in the same direction as this paper · 284 in the opposite direction · 39 reporting no difference from an alternative
- positive
- no effect
- negative
3,434 papers more in this group
See all 3,438 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.