Abstract
Green manure may have potential uses in dryland agroecosystems. This study determined the effect of green manure on residual soil water and soil N and the subsequent durum wheat ( Triticum turgidum L.) performance in comparison with the effect of preceding dry pea ( Pisum sativum L.), silage pea ( Pisum sativum L.), and spring wheat ( T. aestivum L.). Three green manures [black lentil ( Lens culinaris Medik.), chickling vetch ( Lathyrus sativus L.), and forage pea ( Pisum sativum L.)] were grown in 2006, 2007, and 2008, along with pea, wheat, and a summerfallow (check) in Saskatchewan, Canada. Durum wheat was grown the year after these treatments. At durum wheat planting, the green manure treatments had the same amount of water in the 0‐ to 1.2‐m soil profile as the summerfallow in 2007 and 2009 but less water compared with the summerfallow in 2008. Summerfallow provided highest soil N among all treatments in 2007 and 2008 but lower soil N than green manure treatments in 2009. Green manure treatments increased subsequent durum wheat grain yield by 19% compared with preceding silage pea or dry pea and by 54% compared with preceding spring wheat but decreased yield by 12% compared with summerfallow treatments. The green manure with late planting and termination enhanced soil‐water conservation and offered input‐saving advantages compared with the early‐ and mid‐planting and termination treatments. Overall, green manure treatments enhanced soil water storage, provided N benefits, and increased subsequent durum wheat yield compared with crops harvested for grain. Core Ideas Green manures conserve a similar amount of water in the 0‐ to 1.2‐m soil profile as summerfallow. Green manures provides less N benefits as summerfallow to the crops the following year. Durum wheat after green manures yielded 19 to 54% more than the other preceding crops. Delay planting of green manures offers water‐saving advantages in dry environments.
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Claims 9
Claim · model-written summary
Green manure plots had the same soil water as summerfallow in 2007 and 2009.
- Taxon
- Durum Wheat
Triticum turgidum subsp. durumt0 - Treatment
- green manure treatmentse0
- Outcome
- water in the 0‐ to 1.2‐m soil profilee0
- Direction
- samee0
- Qualifier
- in 2007 and 2009e0
- Comparator
- summerfallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“green manure treatments had the same amount of water in the 0‐ to 1.2‐m soil profile as the summerfallow in 2007 and 2009”
t0“Durum Wheat”
Claim · model-written summary
Green manure plots had less soil water than summerfallow in 2008.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- green manure treatmentse1
- Outcome
- watere0
- Direction
- lesse0
- Qualifier
- in 2008e0
- Comparator
- summerfallowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less water compared with the summerfallow in 2008”
e1“the green manure treatments had the same amount of water”
t0“Durum Wheat”
Claim · model-written summary
Summerfallow supplied the highest soil nitrogen in 2007 and 2008.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- Summerfallowe0
- Outcome
- soil Ne0
- Direction
- higheste0
- Comparator
- all treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Summerfallow provided highest soil N among all treatments in 2007 and 2008”
t0“Durum Wheat”
Claim · model-written summary
Summerfallow had lower soil nitrogen than green manure in 2009.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- Summerfallowe1
- Outcome
- soil Ne0
- Direction
- lowere0
- Comparator
- green manure treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lower soil N than green manure treatments in 2009”
e1“Summerfallow”
t0“Durum Wheat”
Claim · model-written summary
Green manure increased following durum wheat grain yield by 19% versus silage or dry pea.
- Taxon
- durum wheatTriticum turgidum subsp. durume0
- Treatment
- Green manure treatmentse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 19%e0
- Comparator
- preceding silage pea or dry peae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green manure treatments increased subsequent durum wheat grain yield by 19% compared with preceding silage pea or dry pea”
Claim · model-written summary
Green manure increased following durum wheat grain yield by 54% versus spring wheat.
- Taxon
- durum wheatTriticum turgidum subsp. durume0
- Treatment
- Green manure treatmentse0
- Outcome
- grain yielde0
- Direction
- increasede0
- Value
- 54%e0
- Comparator
- preceding spring wheate0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green manure treatments increased subsequent durum wheat grain yield by 19% compared with preceding silage pea or dry pea and by 54% compared with preceding spring wheat”
Claim · model-written summary
Green manure reduced durum wheat grain yield by 12% relative to summerfallow.
- Taxon
- durum wheatTriticum turgidum subsp. durume0
- Treatment
- Green manure treatmentse0
- Outcome
- yielde0
- Direction
- decreasede0
- Value
- 12%e0
- Comparator
- summerfallow treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Green manure treatments increased subsequent durum wheat grain yield by 19% compared with preceding silage pea or dry pea and by 54% compared with preceding spring wheat but decreased yield by 12% compared with summerfallow treatments”
Claim · model-written summary
Late green manure planting and termination enhanced soil water conservation versus earlier timing.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- green manure with late planting and terminatione0
- Outcome
- soil‐water conservatione0
- Direction
- enhancede0
- Comparator
- early‐ and mid‐planting and termination treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The green manure with late planting and termination enhanced soil‐water conservation and offered input‐saving advantages compared with the early‐ and mid‐planting and termination treatments”
t0“Durum Wheat”
Claim · model-written summary
Late green manure planting and termination offered input savings versus earlier timing.
- Taxon
- Durum WheatTriticum turgidum subsp. durumt0
- Treatment
- green manure with late planting and terminatione0
- Outcome
- input‐saving advantagese0
- Direction
- advantagese0
- Comparator
- early‐ and mid‐planting and termination treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The green manure with late planting and termination enhanced soil‐water conservation and offered input‐saving advantages compared with the early‐ and mid‐planting and termination treatments”
t0“Durum Wheat”
The same questions in other papers
fertilization · yield · Triticum turgidum (rivet wheat)Results differ
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- negative
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2 papers in the same direction as this paper · 2 in the opposite direction
- negative
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See all 5 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.