Abstract
In western Canada, limited research has been conducted on reduced‐tillage grain production systems managed organically. The objective was to select cover crop mulches for an organic rotational no‐till system in Manitoba. A 2‐yr field study (2010–2011, and repeated 2011–2012) was conducted in Carman, MB, Canada. In the cover crop year, 10 different combinations of cover crop species were seeded in the spring, in pure stand or in mixtures, and rolled using a roller‐crimper in mid‐summer, at the flowering stage. These rolled mulches were then left on the soil surface over the fall and winter. The following spring, spring wheat ( Triticum aestivum L.) was seeded directly into these mulches (no‐till). Mulches with hairy vetch ( Vicia villosa Roth) showed the most promising results. Cover crop treatments with vetch had the highest mulch biomass in September of the cover crop year (9.1–10.7 Mg ha −1 ), and in the following spring (6.0–7.6 Mg ha −1 ) and provided the best weed control. In late fall of the cover crop year, N content of mulches with vetch reached high levels (308 kg N ha −1 on average), and high amounts of N (93–164 kg N ha −1 ) were released from these mulches over winter. Organic spring wheat no‐till planted into mulches with vetch produced yields comparable to regional conventional average yields. Mulches with vetch used in an organic rotational no‐till system reduced the need for tillage for a period of 1.5 to 2 yr without affecting yields of organic spring wheat.
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Claims 7
Claim · model-written summary
Vetch cover crop treatments had September mulch biomass of 9.1–10.7 Mg ha −1.
Verbatim
e0“Cover crop treatments with vetch had the highest mulch biomass in September of the cover crop year (9.1–10.7 Mg ha −1 )”
Claim · model-written summary
Vetch mulch biomass was 6.0–7.6 Mg ha −1 the following spring.
Verbatim
e0“in the following spring (6.0–7.6 Mg ha −1 )”
e1“Cover crop treatments with vetch had the highest mulch biomass”
Claim · model-written summary
Vetch mulches provided the best weed control.
Not reportedComparator
Verbatim
e0“Mulches with hairy vetch ( Vicia villosa Roth) showed the most promising results.”
e1“provided the best weed control.”
Claim · model-written summary
Vetch mulch N content averaged 308 kg N ha −1 in late fall.
Verbatim
e0“In late fall of the cover crop year, N content of mulches with vetch reached high levels (308 kg N ha −1 on average)”
Claim · model-written summary
Vetch mulches released 93–164 kg N ha −1 over winter.
Verbatim
e0“high amounts of N (93–164 kg N ha −1 ) were released from these mulches over winter.”
e1“N content of mulches with vetch reached high levels”
Claim · model-written summary
Organic no-till spring wheat in vetch mulch yielded comparably to regional conventional averages.
- Taxon
- spring wheat
Triticum aestivume0 - Treatment
- no‐till planted into mulches with vetche0
- Outcome
- yieldse0
- Direction
- comparablee0
- Comparator
- regional conventional average yieldse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Organic spring wheat no‐till planted into mulches with vetch produced yields comparable to regional conventional average yields.”
Claim · model-written summary
Vetch mulch reduced tillage need for 1.5 to 2 yr without affecting wheat yields.
- Taxon
- spring wheatTriticum aestivume0
- Treatment
- Mulches with vetche0
- Outcome
- need for tillagee0
- Direction
- reducede0
- Value
- 1.5 to 2 yre0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Mulches with vetch used in an organic rotational no‐till system reduced the need for tillage for a period of 1.5 to 2 yr without affecting yields of organic spring wheat.”
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297 papers in the same direction as this paper · 1,116 reporting no difference from an alternative
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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.