Abstract
The use of direct seeding (no-till) in place of tillage can reduce soil erosion and improve water infiltration. However, despite these improvements in soil quality, growers in the Pacific Northwest are reluctant to adopt direct seeding, partially because of fears of increased root diseases caused by Gaeumannomyces graminis var. tritici, Rhizoctonia spp., and Pythium spp. To examine the effect of the transition from conventional tillage to direct seeding, field plots were established at two locations. One site had been managed with direct seeding for 12 years, and the second had been conventionally tilled. Over 4 years, a portion of each plot was tilled or direct seeded, and planted to wheat or barley. Plants in the tilled plots had consistently more crown roots than plants in direct-seeded plots. Rhizoctonia root rot and yield did not differ between tillage types during the first 2 years of the study. However, in the third and fourth years of the transition to direct seeding, a higher incidence of Rhizoctonia root rot, increased hyphal activity of R. solani, and reduced yields were observed in direct-seeded plots. Populations of R. oryzae and Pythium spp., and incidence of take-all were the same for both management practices.
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Claims 8
Claim · model-written summary
Wheat and barley plants in tilled plots had consistently more crown roots than plants in direct-seeded plots.
- Taxon
- Wheat and Barley
.jpg?width=60)
Hordeum vulgare
Triticum aestivumt0 - Treatment
- tilled plotse0
- Outcome
- crown rootse0
- Direction
- moree0
- Comparator
- direct-seeded plotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Plants in the tilled plots had consistently more crown roots than plants in direct-seeded plots”
t0“Wheat and Barley”
Claim · model-written summary
Rhizoctonia root rot and yield did not differ between tillage types during the first 2 years of the transition.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- tillage typese0
- Interactor
- Rhizoctonia
.jpg?width=60)
Rhizoctoniae0pathogen - Outcome
- Rhizoctonia root rot and yielde0
- Direction
- did not differe0
- Qualifier
- first 2 yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Rhizoctonia root rot and yield did not differ between tillage types during the first 2 years of the study”
t0“Wheat and Barley”
Claim · model-written summary
In the third and fourth years of the transition, direct-seeded plots had a higher incidence of Rhizoctonia root rot.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- direct-seeded plotse0
- Interactor
- RhizoctoniaRhizoctoniae0pathogen
- Outcome
- incidence of Rhizoctonia root rote0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher incidence of Rhizoctonia root rot, increased hyphal activity of R. solani, and reduced yields were observed in direct-seeded plots”
t0“Wheat and Barley”
Claim · model-written summary
In the third and fourth years of the transition, direct-seeded plots had increased hyphal activity of R. solani.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- direct-seeded plotse0
- Interactor
- R. solani
Rhizoctonia solanie0pathogen - Outcome
- hyphal activity of R. solanie0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher incidence of Rhizoctonia root rot, increased hyphal activity of R. solani, and reduced yields were observed in direct-seeded plots”
t0“Wheat and Barley”
Claim · model-written summary
In the third and fourth years of the transition, yields were reduced in direct-seeded plots.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- direct-seeded plotse0
- Outcome
- yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a higher incidence of Rhizoctonia root rot, increased hyphal activity of R. solani, and reduced yields were observed in direct-seeded plots”
t0“Wheat and Barley”
Claim · model-written summary
Populations of R. oryzae were the same under both management practices.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- both management practicese0
- Interactor
- R. oryzaeWaitea circinatae0pathogen
- Outcome
- Populations of R. oryzaee0
- Direction
- the samee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Populations of R. oryzae and Pythium spp., and incidence of take-all were the same for both management practices”
t0“Wheat and Barley”
Claim · model-written summary
Populations of Pythium spp. were the same under both management practices.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- both management practicese0
- Outcome
- Pythium spp.e0
- Direction
- the samee0
.jpg?width=60){kind=small}
PythiumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Populations of R. oryzae and Pythium spp., and incidence of take-all were the same for both management practices”
t0“Wheat and Barley”
Claim · model-written summary
Incidence of take-all was the same under both management practices.
- Taxon
- Wheat and BarleyHordeum vulgareTriticum aestivumt0
- Treatment
- both management practicese0
- Interactor
- Gaeumannomyces graminis var. triticiGaeumannomyces triticie1pathogen
- Outcome
- incidence of take-alle0
- Direction
- the samee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Populations of R. oryzae and Pythium spp., and incidence of take-all were the same for both management practices”
e1“Gaeumannomyces graminis var. tritici”
t0“Wheat and Barley”
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See all 176 papers →tillage · Rhizoctonia · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
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transplanting · Rhizoctonia solani · Hordeum vulgare (barley)Results agree
1 paper in the same direction as this paper
- negative
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.