Abstract
Abstract The Southern Great Plains (SGP) region of the United States is widely known for its dryland dual‐purpose winter wheat ( Triticum aestivum L.) cropping systems—integrated systems that provide both livestock grazing and grain production. Few of these systems are organic, however, and no relevant research had been conducted on this topic. A large‐scale (41 ha) systems research study was conducted for 3 yr (2018–2021) to compare a transitional organic dual‐purpose wheat system with a conventional one, with system management components customized to the ecological region. Organic wheat yield was 20% lower than conventional in the first season of organic transition, but there was no yield difference by the third year. The yield improvement in the organic system may be attributed to N fixation by a legume‐based cash crop the previous winter season, exogenous nutrients from application of composted manure, and appropriate wheat cultivar selection. Because of limited moisture, relying on annual establishment of summer cover crops to fix N and deliver other ecosystem services in the organic system was not feasible in most years. Grain protein concentration (GPC) of the transitional organic wheat ranged from 91 to 103 g kg −1 , below the 120 g kg −1 threshold for a food market organic price premium. More intensive N management, including in‐season application of a more available form of N that is organic approved, could be an effective strategy to increase GPC. This proof‐of‐concept study shows that organic dual‐purpose wheat systems can be a viable enterprise in the SGP, though additional research is needed to address challenges identified herein.
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Claims 6
Claim · model-written summary
Organic wheat yield was 20% lower than conventional in the first season.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- Organice0
- Outcome
- wheat yielde0
- Direction
- lowere0
- Value
- 20%e0
- Comparator
- conventionale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Organic wheat yield was 20% lower than conventional in the first season of organic transition”
Claim · model-written summary
By year three, organic and conventional wheat yield did not differ.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- Organict0
- Outcome
- yielde0
- Direction
- no yield differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was no yield difference by the third year”
t0“Organic transition in dual‐purpose wheat systems”
Claim · model-written summary
Annual summer cover crops were infeasible in most years because moisture was limited.
Verbatim
e0“Because of limited moisture, relying on annual establishment of summer cover crops to fix N and deliver other ecosystem services in the organic system was not feasible in most years”
Claim · model-written summary
Transitional organic wheat grain protein was 91 to 103 g kg −1, below the 120 g kg −1 premium threshold.
- Taxon
- wheatTriticum aestivume0
- Outcome
- Grain protein concentration (GPC)e0
- Direction
- belowe0
- Value
- 91 to 103 g kg −1e0
- Qualifier
- 120 g kg −1 thresholde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain protein concentration (GPC) of the transitional organic wheat ranged from 91 to 103 g kg −1 , below the 120 g kg −1 threshold for a food market organic price premium”
Claim · model-written summary
The authors suggest more intensive organic nitrogen management could increase grain protein concentration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- More intensive N managemente0
- Outcome
- increase GPCe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More intensive N management, including in‐season application of a more available form of N that is organic approved, could be an effective strategy to increase GPC”
t0“wheat”
Claim · model-written summary
The authors consider organic dual-purpose wheat viable in the Southern Great Plains.
- Taxon
- wheatTriticum aestivume0
- Outcome
- viable enterprisee0
- Setting
- SGPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“organic dual‐purpose wheat systems can be a viable enterprise in the SGP”
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