Abstract
Occasional tillage ahead of winter wheat planting could alleviate herbicide-resistant weeds, redistribute soil acidification, and improve seedbed at wheat planting. The objective of this study is to determine occasional tillage and nitrogen (N) fertilizer application effects on winter wheat, and grain sorghum yields and soil quality in a wheat-sorghum-fallow cropping system. Treatments were three tillage practices: 1) continuous no-tillage (NT); 2) continuous reduced-tillage (RT); and 3) single tillage operation every 3 years (June-July) ahead of winter wheat planting [occasional tillage (OT)]. The sub-plot treatments were assigned to four N fertilizer rates (0, 40, 80 and 120 lb/a of N). Preliminary results showed tillage had no effect on winter wheat grain yield. Applying N fertilizer increased wheat yield, ranging from 21 bu/a with no N fertilizer to 29 bu/a when N fertilizer was applied at 120 lb/a of N. Tillage and N fertilizer effects on grain sorghum yield varied over the 2 years of the study. Grain sorghum yields in 2017 decreased with RT but tillage had no effect on sorghum yields in 2018. Averaged across tillage and years, sorghum grain yield was 54 bu/a with no N fertilizer and 84 bu/a when N was applied at 120 lb/a of N. Both sorghum and winter wheat grain yields obtained with 80 lb/a of N were not different from those with 120 lb/a of N, suggesting 80 lb/a of N may be adequate for both crops.
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Claims 8
Claim · model-written summary
Tillage had no effect on winter wheat grain yield.
- Taxon
- winter wheat
Triticum aestivume0 - Treatment
- tillagee0
- Outcome
- winter wheat grain yielde0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Preliminary results showed tillage had no effect on winter wheat grain yield.”
Claim · model-written summary
Applying nitrogen increased wheat yield from 21 bu/a without nitrogen to 29 bu/a at 120 lb/a of N.
- Taxon
- wheatTriticum aestivume0
- Treatment
- N fertilizer was applied at 120 lb/a of Ne0
- Outcome
- wheat yielde0
- Direction
- increasede0
- Value
- 29 bu/ae0
- Qualifier
- 21 bu/ae0
- Comparator
- no N fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Applying N fertilizer increased wheat yield, ranging from 21 bu/a with no N fertilizer to 29 bu/a when N fertilizer was applied at 120 lb/a of N.”
Claim · model-written summary
Reduced tillage decreased grain sorghum yield in 2017.
- Taxon
- Grain sorghum
Sorghum bicolore0 - Treatment
- RTe0
- Outcome
- Grain sorghum yieldse0
- Direction
- decreasede0
- Qualifier
- 2017e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain sorghum yields in 2017 decreased with RT”
Claim · model-written summary
Tillage had no effect on sorghum yield in 2018.
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“tillage had no effect on sorghum yields in 2018.”
Claim · model-written summary
Sorghum grain yield averaged 84 bu/a at 120 lb/a of N versus 54 bu/a without nitrogen.
- Treatment
- N was applied at 120 lb/a of Ne0
- Outcome
- sorghum grain yielde0
- Direction
- higherinferrede0
- Value
- 84 bu/ae0
- Qualifier
- 54 bu/ae0
- Comparator
- no N fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Averaged across tillage and years, sorghum grain yield was 54 bu/a with no N fertilizer and 84 bu/a when N was applied at 120 lb/a of N.”
Claim · model-written summary
Sorghum yield with 80 lb/a N was not different from yield with 120 lb/a N.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both sorghum and winter wheat grain yields obtained with 80 lb/a of N were not different from those with 120 lb/a of N”
Claim · model-written summary
Winter wheat yield with 80 lb/a N was not different from yield with 120 lb/a N.
- Taxon
- winter wheatTriticum aestivume0
- Treatment
- 80 lb/a of Ne0
- Outcome
- winter wheat grain yieldse0
- Direction
- not differente0
- Comparator
- 120 lb/a of Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both sorghum and winter wheat grain yields obtained with 80 lb/a of N were not different from those with 120 lb/a of N”
Claim · model-written summary
The authors suggest 80 lb/a of N may be adequate for both crops.
Verbatim
e0“suggesting 80 lb/a of N may be adequate for both crops.”
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