Abstract
Cover crops grown on summer fallow in semiarid environments can be used to provide soil erosion protection and enhance soil nutrients. The economic benefits and costs of fallow cover crop systems were evaluated using fall and spring rye (Secale cereale L.) cover crops with minimum and zero tillage, and using sweet clover (Melilotus officinalis (L.) Lam.) established in companion crops of field peas (Pisum sativum L.), mustard (Brassica juncea (L.) Coss.), or flax (Linum usitatissimum L.) and terminated in the fallow year by four methods. Spring wheat (Triticum aestivum L.) followed the fallow or partial fallow year. The fall rye-minimum tillage system had average returns similar to the no cover-zero tillage, and lower but not significantly different returns from the no cover-minimum tillage system. The lower companion crop yields in which sweet clover was underseeded, reduced the economic benefit of the sweet clover cover crop. Mustard was the most profitable companion crop. Harvesting the sweet clover as hay increased net returns over soil incorporation. For the sweet clover system to be competitive with conventional fallow, reducing the negative effect of sweet clover on companion crop yield is required.
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Claims 6
Claim · model-written summary
Fall rye with minimum tillage had average returns similar to no cover with zero tillage.
- Taxon
- rye (Secale cereale L.)
Secale cerealee1 - Treatment
- fall rye-minimum tillage systeme2
- Outcome
- average returnse2
- Direction
- similare2
- Comparator
- no cover-zero tillagee2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“using fall and spring rye (Secale cereale L.) cover crops with minimum and zero tillage”
e2“The fall rye-minimum tillage system had average returns similar to the no cover-zero tillage, and lower but not significantly different returns from the no cover-minimum tillage system”
Claim · model-written summary
Fall rye with minimum tillage had lower average returns than no cover with minimum tillage, but the difference was not significant.
- Taxon
- rye (Secale cereale L.)Secale cerealee1
- Treatment
- fall rye-minimum tillage systeme2
- Outcome
- average returnse2
- Direction
- lower but not significantly differente2
- Comparator
- no cover-minimum tillage systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“using fall and spring rye (Secale cereale L.) cover crops with minimum and zero tillage”
e2“The fall rye-minimum tillage system had average returns similar to the no cover-zero tillage, and lower but not significantly different returns from the no cover-minimum tillage system”
Claim · model-written summary
Sweet clover underseeded in companion crops lowered companion crop yields, which reduced the economic benefit of the sweet clover cover crop.
- Taxon
- sweet clovere3
- Treatment
- sweet clover was underseedede3
- Outcome
- companion crop yieldse3
- Direction
- lowere3
- Qualifier
- reduced the economic benefit of the sweet clover cover crope3
Not reportedComparator
Verbatim
e3“The lower companion crop yields in which sweet clover was underseeded, reduced the economic benefit of the sweet clover cover crop”
Claim · model-written summary
Mustard was the most profitable companion crop.
- Taxon
- mustard (Brassica juncea (L.) Coss.)
Brassica junceae0 - Outcome
- most profitable companion crope4
- Direction
- most profitablee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“mustard (Brassica juncea (L.) Coss.)”
e4“Mustard was the most profitable companion crop”
Claim · model-written summary
Harvesting sweet clover as hay increased net returns compared with soil incorporation.
Verbatim
e5“Harvesting the sweet clover as hay increased net returns over soil incorporation”
Claim · model-written summary
Reducing the negative effect of sweet clover on companion crop yield is required for the sweet clover system to be competitive with conventional fallow.
Verbatim
e6“For the sweet clover system to be competitive with conventional fallow, reducing the negative effect of sweet clover on companion crop yield is required”
The same questions in other papers
tillage · yield · Secale cereale (rye)Positive and negative results
5 papers in the same direction as this paper · 4 reporting no difference from an alternative
- positive
- positive
- positive
6 papers more in this group
See all 10 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.