Abstract
Adoption of no‐till seeding practices by many farmers has increased interest in using anhydrous ammonia (AA) in single‐pass seeding operations. It is expected that crop response to different fertilizer N sources and fertilizer placement will vary at the landscape level, because of inherent differences in soils related to topography. Two openers (side‐band and sweep wing tip) were evaluated for use in a single‐pass seeding operation of spring wheat ( Triticum aestivum L.). The openers differed in fertilizer placement and soil disturbance. The effect of AA on grain yield and protein content as influenced by application rate and opener was investigated at varied landscape positions. The experiment was conducted at six sites in two years using a randomized complete block design. Averaged across year and location, wheat grain yield was higher on footslopes than on shoulders; however, the effect of landscape position was not consistent at all locations. Landscape position did not affect protein content. Application of AA with either opener resulted in grain yields and protein contents comparable to granular urea and ammonium nitrate (AN) fertilizers. Even at the highest AA application rate tested (105 kg N ha −1 ), no crop damage was expressed in final yield.
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Claims 5
Claim · model-written summary
Wheat grain yield averaged higher on footslopes than shoulders, inconsistently across locations.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- grain yielde0
- Direction
- highere0
- Qualifier
- not consistent at all locationse0
- Comparator
- shoulderse0
- Setting
- footslopese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“wheat grain yield was higher on footslopes than on shoulders; however, the effect of landscape position was not consistent at all locations”
Claim · model-written summary
Landscape position did not affect wheat protein content.
- Taxon
- Spring WheatTriticum aestivumt0
- Outcome
- protein contente0
- Direction
- did not affecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Landscape position did not affect protein content”
t0“Spring Wheat”
Claim · model-written summary
Anhydrous ammonia with either opener yielded grain amounts comparable to granular urea and ammonium nitrate.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- AA with either openere0
- Outcome
- grain yieldse0
- Direction
- comparablee0
- Comparator
- granular urea and ammonium nitrate (AN) fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of AA with either opener resulted in grain yields and protein contents comparable to granular urea and ammonium nitrate (AN) fertilizers”
t0“Spring Wheat”
Claim · model-written summary
Anhydrous ammonia with either opener yielded grain protein comparable to granular urea and ammonium nitrate.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- AA with either openere0
- Outcome
- protein contentse0
- Direction
- comparablee0
- Comparator
- granular urea and ammonium nitrate (AN) fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of AA with either opener resulted in grain yields and protein contents comparable to granular urea and ammonium nitrate (AN) fertilizers”
t0“Spring Wheat”
Claim · model-written summary
Anhydrous ammonia at 105 kg N ha −1 caused no crop damage in final yield.
- Taxon
- Spring WheatTriticum aestivumt0
- Treatment
- AA application rate tested (105 kg N ha −1 )e0
- Outcome
- crop damage was expressed in final yielde0
- Direction
- noe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Even at the highest AA application rate tested (105 kg N ha −1 ), no crop damage was expressed in final yield”
t0“Spring Wheat”
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