Abstract
Wind erosion and blowing dust on conventionally tilled winter wheat ( Triticum aestivum L.)–summer fallow cropland in eastern Washington, USA, reduces soil productivity and can contribute to poor air quality. Conservation tillage during fallow has long been known to curtail erosion and dust, but conventional tillage (CT) is still practiced on more than 80% of the cropland in the region. This paper reports the economic results of a 5‐yr (1995–1999 harvest years) tillage system study at Lind, WA. The site averages 244 mm of annual precipitation, and the soil is a Shano silt loam (coarse‐silty, mixed, superactive, mesic Xeric Haplocambids). Tillage systems were (i) CT, (ii) minimum tillage (MT; herbicides and tillage), and (iii) delayed MT (DMT; herbicides and delayed tillage). Wheat grain yield across years ranged from 1.79 to 5.20 Mg ha −1 , but there were no differences in grain yield among tillage systems in any year or when analyzed across years. Tillage systems were economically equivalent based on market returns over total production costs, but DMT was slightly less profitable than CT based on market returns over variable costs. Economic analysis indicates that no subsidies should be required to entice producers to switch from CT to MT fallow because the systems are equally profitable. Because there is no short‐ or long‐term economic sacrifice for converting to the soil‐saving MT system, it represents a win‐win solution for farmers and the environment.
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Claims 5
Claim · model-written summary
Wheat grain yield ranged from 1.79 to 5.20 Mg ha −1 across years.
- Taxon
- Wheat
Triticum aestivume0 - Outcome
- grain yielde0
- Value
- 1.79 to 5.20 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Wheat grain yield across years ranged from 1.79 to 5.20 Mg ha −1”
Claim · model-written summary
Wheat grain yield did not differ among tillage systems in any year or across years.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- tillage systemse0
- Outcome
- grain yielde0
- Direction
- no differencese0
- Comparator
- among tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“there were no differences in grain yield among tillage systems in any year or when analyzed across years”
Claim · model-written summary
Tillage systems had equivalent market returns over total production costs.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- Tillage systemse0
- Outcome
- market returns over total production costse0
- Direction
- economically equivalente0
- Comparator
- Tillage systemse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“Tillage systems were economically equivalent based on market returns over total production costs”
Claim · model-written summary
DMT was slightly less profitable than CT on returns over variable costs.
- Taxon
- WheatTriticum aestivumt0
- Treatment
- DMTe0
- Outcome
- market returns over variable costse0
- Direction
- slightly less profitablee0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“DMT was slightly less profitable than CT based on market returns over variable costs”
Claim · model-written summary
The economic analysis indicates no subsidies are needed to encourage switching from CT to MT fallow.
- Taxon
- WheatTriticum aestivumt0
- Outcome
- no subsidies should be required to entice producers to switch from CT to MT fallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Wheat”
e0“no subsidies should be required to entice producers to switch from CT to MT fallow because the systems are equally profitable”
The same questions in other papers
tillage · yield · Triticum aestivum (wheat)Positive and negative results
297 papers in the same direction as this paper · 1,116 reporting no difference from an alternative
- positive
- positive
- positive
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See all 1,414 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.