Abstract
Cicek, H., Entz, M. H., Thiessen Martens, J. R. and Bullock, P. R. 2014. Productivity and nitrogen benefits of late-season legume cover crops in organic wheat production. Can. J. Plant Sci. 94: 771–783. When full-season cover crops are used in stockless organic rotations, cash crop production is compromised. Including winter cereals in rotations can widen the growing season window and create a niche for late-season cover crops. We investigated the establishment and biomass production of relay-cropped red clover (Trifolium pratense L.) and sweet clover (Melilotus officinalis L. ‘Norgold’) and double-cropped cowpea (Vigna unguiculata L. ‘Iron and Clay’), hairy vetch (Vicia villosa L.), lentil (Lens culinaris L. ‘Indianhead’), soybean (Glycine max L. ‘Prudence’), pea (Pisum sativum L. ‘40-10’), and oil seed radish (Raphanus sativus L.) as well as wheat response to these crops under reduced tillage (RT) and conventional tillage (CT) at three locations in Manitoba, Canada. Red clover, sweet clover and pea produced from 737 to 4075 and 93 to 1453 and 160 to 2357 kg ha −1 of biomass, respectively. All double crops, with the exception of soybean at 2 site years, established successfully under both RT and CT. The presence of cover crops increased wheat N uptake at stem elongation, maturity and yield, even when the biomass production of cover crops was modest. We conclude that late-season cover crops enhance the following wheat yield and facilitate reduced tillage in organic crop production.
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Claims 7
Claim · model-written summary
Red clover produced 737 to 4075 kg ha −1 biomass.
- Taxon
- Red clover
Trifolium pratensee0 - Outcome
- biomasse0
- Value
- 737 to 4075e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red clover, sweet clover and pea produced from 737 to 4075 and 93 to 1453 and 160 to 2357 kg ha −1 of biomass, respectively.”
Claim · model-written summary
Sweet clover produced 93 to 1453 kg ha −1 biomass.
Not reportedDirection
Verbatim
e0“Red clover, sweet clover and pea produced from 737 to 4075 and 93 to 1453 and 160 to 2357 kg ha −1 of biomass, respectively.”
Claim · model-written summary
Pea produced 160 to 2357 kg ha −1 biomass.
- Taxon
- pea
Lathyrus oleraceuse0 - Outcome
- biomasse0
- Value
- 160 to 2357 kg ha −1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Red clover, sweet clover and pea produced from 737 to 4075 and 93 to 1453 and 160 to 2357 kg ha −1 of biomass, respectively.”
Claim · model-written summary
Double crops other than soybean at two site years established under reduced and conventional tillage.
- Taxon
- double cropse0
- Treatment
- both RT and CTe0
- Outcome
- established successfullye0
- Qualifier
- with the exception of soybean at 2 site yearse0
Not reportedDirection
Verbatim
e0“All double crops, with the exception of soybean at 2 site years, established successfully under both RT and CT.”
Claim · model-written summary
Cover crops increased wheat nitrogen uptake at stem elongation and maturity.
- Taxon
- wheat
Triticum aestivume0 - Treatment
- presence of cover cropse0
- Outcome
- wheat N uptake at stem elongation, maturitye0
- Direction
- increasede0
- Qualifier
- even when the biomass production of cover crops was modeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of cover crops increased wheat N uptake at stem elongation, maturity and yield, even when the biomass production of cover crops was modest.”
Claim · model-written summary
Cover crops increased following wheat yield.
- Taxon
- wheatTriticum aestivume0
- Treatment
- presence of cover cropse0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The presence of cover crops increased wheat N uptake at stem elongation, maturity and yield, even when the biomass production of cover crops was modest.”
Claim · model-written summary
The authors conclude that late-season cover crops facilitate reduced tillage in organic production.
- Taxon
- wheatTriticum aestivume0
- Outcome
- facilitate reduced tillage in organic crop productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“We conclude that late-season cover crops enhance the following wheat yield and facilitate reduced tillage in organic crop production.”
The same questions in other papers
cover crop · yield · Triticum aestivum (wheat)Results differ
17 papers in the same direction as this paper · 15 in the opposite direction · 2 reporting no difference from an alternative
- no effect
- negative
- no effect
31 papers more in this group
See all 35 papers →cover crop · growth · Triticum aestivum (wheat)Results agree
2 papers in the same direction as this paper
- positive
- positive
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.