Abstract
A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations; fallow–oilseed–wheat, and oilseed–wheat–wheat, was conducted during 1979–1990. In 36 comparisons of ZT with CT over three rotation phases and 12 yr, ZT increased spring soil moisture in nine cases and resulted in no decreases; increased yield in nine cases while decreasing yield in three; and increased moisture use efficiency in six cases with two decreases. Increases in spring soil moisture were not related to precipitation during the non-growing season but may have been influenced by weeds. Increased spring soil moisture with ZT occurred more frequently on fallow than on stubble, presumably because precipitation was greater. Yield increases with ZT generally occurred where spring soil moisture was increased and weeds were adequately controlled. Yield decreases with ZT were normally associated with poor weed control, but in one case poor seed placement with ZT reduced yield. Throughout the study, inadequate weed control with ZT was a major factor limiting responses. Implications of these results on future research required to improve adoption of this important soil–conserving practice are discussed.Key words: Zero tillage, wheat, canola, flax, available moisture, weeds
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Claims 10
Claim · model-written summary
Zero tillage increased spring soil moisture in nine of 36 comparisons and caused no decreases.
- Taxon
- wheat
Triticum aestivume2 - Treatment
- zero tillage (ZT)e0
- Outcome
- spring soil moisturee1
- Direction
- increasede1
- Value
- nine casese1
- Qualifier
- no decreasese1
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e0“A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations”
e1“ZT increased spring soil moisture in nine cases and resulted in no decreases”
Claim · model-written summary
Zero tillage increased yield in nine cases.
- Taxon
- wheatTriticum aestivume1
- Treatment
- zero tillage (ZT)e0
- Outcome
- yielde2
- Direction
- increasede2
- Value
- nine casese2
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e0“A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations”
e2“increased yield in nine cases while decreasing yield in three”
Claim · model-written summary
Zero tillage decreased yield in three cases.
- Taxon
- wheatTriticum aestivume1
- Treatment
- zero tillage (ZT)e0
- Outcome
- yielde2
- Direction
- decreasinge2
- Value
- threee2
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e0“A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations”
e2“increased yield in nine cases while decreasing yield in three”
Claim · model-written summary
Zero tillage increased moisture use efficiency in six cases.
- Taxon
- wheatTriticum aestivume1
- Treatment
- zero tillage (ZT)e0
- Outcome
- moisture use efficiencye3
- Direction
- increasede3
- Value
- six casese3
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e0“A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations”
e3“increased moisture use efficiency in six cases with two decreases”
Claim · model-written summary
Zero tillage decreased moisture use efficiency in two cases.
- Taxon
- wheatTriticum aestivume1
- Treatment
- zero tillage (ZT)e0
- Outcome
- moisture use efficiencye3
- Direction
- decreasese3
- Value
- twoe3
- Comparator
- conventional tillage (CT)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e0“A study comparing zero tillage (ZT) with conventional tillage (CT) crop production in two rotations”
e3“increased moisture use efficiency in six cases with two decreases”
Claim · model-written summary
Increases in spring soil moisture were not related to precipitation during the non-growing season.
- Taxon
- wheatTriticum aestivume0
- Treatment
- precipitation during the non-growing seasone4
- Outcome
- Increases in spring soil moisturee4
- Direction
- not relatede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e4“Increases in spring soil moisture were not related to precipitation during the non-growing season”
Claim · model-written summary
Increased spring soil moisture with zero tillage occurred more frequently on fallow than on stubble.
- Taxon
- wheatTriticum aestivume0
- Treatment
- ZTe5
- Outcome
- Increased spring soil moisturee5
- Direction
- more frequentlye5
- Comparator
- stubblee5
- Setting
- fallowe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e5“Increased spring soil moisture with ZT occurred more frequently on fallow than on stubble”
Claim · model-written summary
Yield increases with zero tillage generally occurred where spring soil moisture was increased and weeds were adequately controlled.
- Taxon
- wheatTriticum aestivume0
- Treatment
- ZTe6
- Outcome
- yielde6
- Direction
- increasese6
- Qualifier
- where spring soil moisture was increased and weeds were adequately controllede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e6“Yield increases with ZT generally occurred where spring soil moisture was increased and weeds were adequately controlled”
Claim · model-written summary
Yield decreases with zero tillage were normally associated with poor weed control.
- Taxon
- wheatTriticum aestivume0
- Treatment
- ZTe7
- Outcome
- yielde7
- Direction
- decreasese7
- Qualifier
- poor weed controle7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e7“Yield decreases with ZT were normally associated with poor weed control”
Claim · model-written summary
Inadequate weed control with zero tillage was a major factor limiting crop responses.
- Taxon
- wheatTriticum aestivume0
- Outcome
- responsese1
- Qualifier
- inadequate weed control with ZTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Key words: Zero tillage, wheat, canola, flax, available moisture, weeds”
e1“Throughout the study, inadequate weed control with ZT was a major factor limiting responses”
The same questions in other papers
tillage · soil: physics · Triticum aestivum (wheat)Positive and negative results
117 papers in the same direction as this paper · 22 in the opposite direction · 2 reporting no difference from an alternative
- positive
- negative
- negative
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See all 142 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
- negative
- positive
- positive
1,410 papers more in this group
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.