Abstract
Inclusion of a winter legume cover crop into a crop rotation has been suggested as a method to provide a substantial portion of the N requirement of the following crop. While the benefits of winter cover crops such as reduced soil erosion, increased soil organic matter, and increased mulch cover have been well documented, the N contribution to the subsequent crop has shown to be variable. The objective of this study was to determine the N contribution from a red clover ( Trifolium pratense L.) cover crop following wheat ( Triticum aestivum L.) to a subsequent corn ( Zea mays L.) crop. The experiment was conducted at two western Ohio locations over 3 yr. At both locations, red clover was either interseeded into wheat or seeded after harvest, the red clover cover crop was eliminated with tillage or herbicide application, and corn was planted with three N rates (0, 90, and 180 kg N ha −1 ). The data revealed that for three of the four site years (when the cover crop was successfully established) there was no N contribution attributable to the presence of red clover. The one site that did show a N contribution revealed that the amount of N contributed was less than 90 kg N ha −1 However, even when no N benefit was found, yields were improved by non‐N‐related rotational effects. Significant reductions in N fertilization rates following a red clover cover crop are likely to result in lost corn yield opportunities in western Ohio.
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Claims 4
Claim · model-written summary
Three of four site years showed no nitrogen contribution from red clover when cover crops established.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- presence of red clovere0
- Interactor
- red clover
Trifolium pratensee0other - Outcome
- N contributione0
- Direction
- noe0
- Value
- three of the four site yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for three of the four site years (when the cover crop was successfully established) there was no N contribution attributable to the presence of red clover.”
t0“corn”
Claim · model-written summary
At the one site with a nitrogen contribution, it was less than 90 kg N per hectare.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- red cloverTrifolium pratensee1othere0
- Outcome
- amount of N contributede0
- Direction
- less thane0
- Value
- 90 kg N ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The one site that did show a N contribution revealed that the amount of N contributed was less than 90 kg N ha −1”
t0“Corn following Wheat in Western Ohio”
e1“red clover ( Trifolium pratense L.) cover crop”
Claim · model-written summary
Corn yields improved through rotational effects unrelated to nitrogen even when no nitrogen benefit occurred.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Red Clovert0
- Outcome
- yieldse0
- Direction
- improvede0
- Qualifier
- non‐N‐related rotational effectse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“even when no N benefit was found, yields were improved by non‐N‐related rotational effects.”
t0“Red Clover for Corn”
Claim · model-written summary
The authors caution that large nitrogen rate reductions after red clover likely lose corn yield opportunity in western Ohio.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Significant reductions in N fertilization rates following a red clover cover crope0
- Outcome
- lost corn yield opportunitiese0
- Setting
- western Ohioe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant reductions in N fertilization rates following a red clover cover crop are likely to result in lost corn yield opportunities in western Ohio.”
The same questions in other papers
Trifolium pratense · yield · Zea mays (maize)Positive and negative results
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See all 14 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.