Abstract
Field trials were conducted over 4 site-years in southern Manitoba to compare the response of Katepwa wheat, Westar canola and Victoria field pea to zero tillage (ZT). The experimental design was a split plot with tillage system as the mainplot (ZT vs. conventional tillage (CT)) and crop species as the subplot. All crops received protection from insect, weed and disease pests. Tillage system had only a limited impact on crop dry matter accumulation or grain quality. Where differences were observed, crop performance was enhanced under ZT. Seasonal evapotranspiration (ET) was either reduced or unaffected by ZT, while ET efficiency (ETE: kg ha −1 mm −1 ET) was either increased or unchanged by the shift from CT to ZT. Higher ETE under ZT was attributed to less soil water evaporation. Significant tillage system × crop species (T × S) interactions for growth parameters, ET and ETE indicated that field pea often benefitted more than wheat or canola from ZT. A significant T × S interaction at one of the four sites indicated that water extraction between 30 and 90 cm was higher for pea and canola in the ZT compared with CT treatment, while soil water extraction by wheat was reduced under ZT. At a second site, lower ET for all three crops under ZT was attributed to reduced water use between 90 and 130 cm. Despite some effects of ZT on crop growth and water use, no significant tillage, T × S, or site × tillage interactions were observed for grain yield. It was concluded that under the conditions of this study (i.e. precipitation and temperature conditions close to the long-term average), Westar canola, Victoria field pea and Katepwa wheat were, for the most part, equally suited to ZT production. Key words: Soil water extraction, evapotranspiration efficiency, crop quality, grain yield, canopy development
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Zero tillage had limited effects on crop dry matter and grain quality.
- Taxon
- wheat
Triticum aestivumt0 - Treatment
- Tillage systeme0
- Outcome
- crop dry matter accumulation or grain qualitye0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage system had only a limited impact on crop dry matter accumulation or grain quality.”
t0“wheat”
Claim · model-written summary
Where differences occurred, zero tillage enhanced crop performance.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ZTe0
- Outcome
- crop performancee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where differences were observed, crop performance was enhanced under ZT.”
t0“wheat”
Claim · model-written summary
Zero tillage reduced or did not affect seasonal evapotranspiration.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ZTe0
- Outcome
- Seasonal evapotranspiration (ET)e0
- Direction
- reduced or unaffectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seasonal evapotranspiration (ET) was either reduced or unaffected by ZT”
t0“wheat”
Claim · model-written summary
Zero tillage increased or did not change evapotranspiration efficiency.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ZTe0
- Outcome
- ET efficiencye0
- Direction
- increased or unchangede0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ET efficiency (ETE: kg ha −1 mm −1 ET) was either increased or unchanged by the shift from CT to ZT.”
t0“wheat”
Claim · model-written summary
Pea often benefited more from zero tillage than wheat or canola for growth and water use.
Verbatim
e0“Significant tillage system × crop species (T × S) interactions for growth parameters, ET and ETE indicated that field pea often benefitted more than wheat or canola from ZT.”
Claim · model-written summary
At one site, zero tillage increased pea water extraction at 30–90 cm.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- ZTe0
- Outcome
- water extraction between 30 and 90 cme0
- Direction
- highere0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water extraction between 30 and 90 cm was higher for pea and canola in the ZT compared with CT treatment”
Claim · model-written summary
At one site, zero tillage increased canola water extraction at 30–90 cm.
- Taxon
- canola
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- ZTe0
- Outcome
- water extraction between 30 and 90 cme0
- Direction
- highere0
- Comparator
- CTe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“water extraction between 30 and 90 cm was higher for pea and canola in the ZT compared with CT treatment”
Claim · model-written summary
Zero tillage reduced wheat soil water extraction.
- Taxon
- wheatTriticum aestivume0
- Treatment
- ZTe0
- Outcome
- soil water extractione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soil water extraction by wheat was reduced under ZT.”
Claim · model-written summary
At another site, zero tillage lowered evapotranspiration for all three crops through reduced deep water use.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- ZTe0
- Outcome
- ETe0
- Qualifier
- reduced water use between 90 and 130 cme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower ET for all three crops under ZT was attributed to reduced water use between 90 and 130 cm.”
t0“wheat”
Claim · model-written summary
Zero tillage had no significant effect on grain yield.
- Taxon
- wheatTriticum aestivumt0
- Treatment
- tillagee0
- Outcome
- grain yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no significant tillage, T × S, or site × tillage interactions were observed for grain yield.”
t0“wheat”
Claim · model-written summary
The cultivars were considered generally suitable for zero tillage production under near-average weather.
- Taxon
- wheatTriticum aestivume0
- Outcome
- equally suited to ZT productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Westar canola, Victoria field pea and Katepwa wheat were, for the most part, equally suited to ZT production.”
The same questions in other papers
tillage · physiology: water · Triticum aestivum (wheat)Results differ
96 papers in the same direction as this paper · 17 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- no effect
113 papers more in this group
See all 117 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
- negative
- 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.