Abstract
Forage radish ( Raphanus sativus L. var. longipinnatus ) is a new winter cover crop in the Mid‐Atlantic region. The objective of this project was to characterize the repeatability, amount, and duration of weed suppression during and after a fall‐planted forage radish cover crop and to quantify the subsequent effect on no‐till seeded corn ( Zea mays L.). Forage radish cover crops were grown in 10 site‐years in the coastal plain of Maryland and followed by a corn crop in seven site‐years. Forage radish was compared to rye ( Secale cereale L.) and no cover crop treatments. Early and typical corn planting dates along with contrasting herbicide management strategies were compared over four site‐years. Forage radish produced 3.9 to 6.6 Mg ha −1 of shoot dry matter and 1.3 to 3.2 Mg ha −1 of fleshy root dry matter when planted before 1 September. Forage radish did not reduce population or grain yield in subsequent corn crops. Forage radish provided complete suppression of winter annual weeds in fall and early spring but the suppression did not persist into the subsequent cropping season. When forage radish cover crops were used in place of preplant burndown herbicide treatments to control weeds in early planted corn, some weeds were present at the time of corn emergence but corn yields were not reduced as long as emerged weeds were controlled with a postemergence herbicide. Strategies to use the weed suppression of forage radish cover crops should focus on fall weed suppression and the early spring preplant window of weed control.
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Claims 7
Claim · model-written summary
Forage radish produced 3.9 to 6.6 Mg ha −1 of shoot dry matter when planted before 1 September.
- Taxon
- Raphanus sativus L. var. longipinnatus
Raphanus sativus var. longipinnatuse6 - Outcome
- shoot dry mattere0
- Value
- 3.9 to 6.6 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Raphanus sativus L. var. longipinnatus”
e0“Forage radish produced 3.9 to 6.6 Mg ha −1 of shoot dry matter”
Claim · model-written summary
Forage radish produced 1.3 to 3.2 Mg ha −1 of fleshy root dry matter when planted before 1 September.
- Taxon
- Raphanus sativus L. var. longipinnatusRaphanus sativus var. longipinnatuse6
- Outcome
- fleshy root dry mattere1
- Value
- 1.3 to 3.2 Mg ha −1e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Raphanus sativus L. var. longipinnatus”
e1“1.3 to 3.2 Mg ha −1 of fleshy root dry matter when planted before 1 September”
Claim · model-written summary
Forage radish did not reduce corn population or grain yield in subsequent corn crops compared with no cover crop.
- Taxon
- corn
Zea mays subsp. mayse2 - Treatment
- Forage radishe2
- Outcome
- population or grain yielde2
- Direction
- did not reducee2
- Comparator
- no cover crop treatmentse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Forage radish did not reduce population or grain yield in subsequent corn crops”
e7“Forage radish was compared to rye ( Secale cereale L.) and no cover crop treatments”
Claim · model-written summary
Forage radish provided complete suppression of winter annual weeds in fall and early spring.
- Taxon
- Raphanus sativus L. var. longipinnatusRaphanus sativus var. longipinnatuse6
- Treatment
- Forage radishe3
- Interactor
- winter annual weedse3weed
- Outcome
- winter annual weedse3
- Direction
- complete suppressione3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Raphanus sativus L. var. longipinnatus”
e3“Forage radish provided complete suppression of winter annual weeds in fall and early spring but the suppression did not persist into the subsequent cropping season”
Claim · model-written summary
The weed suppression of forage radish did not persist into the subsequent cropping season.
- Taxon
- Raphanus sativus L. var. longipinnatusRaphanus sativus var. longipinnatuse6
- Treatment
- Forage radishe3
- Outcome
- suppressione3
- Direction
- did not persiste3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Raphanus sativus L. var. longipinnatus”
e3“Forage radish provided complete suppression of winter annual weeds in fall and early spring but the suppression did not persist into the subsequent cropping season”
Claim · model-written summary
Corn yields were not reduced when forage radish replaced preplant burndown herbicide, as long as emerged weeds were controlled with a postemergence herbicide.
- Taxon
- cornZea mays subsp. mayse4
- Treatment
- forage radish cover cropse4
- Interactor
- weedse4weed
- Outcome
- corn yieldse4
- Direction
- were not reducede4
- Qualifier
- as long as emerged weeds were controlled with a postemergence herbicidee4
- Comparator
- preplant burndown herbicide treatmentse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“When forage radish cover crops were used in place of preplant burndown herbicide treatments to control weeds in early planted corn, some weeds were present at the time of corn emergence but corn yields were not reduced as long as emerged weeds were controlled with a postemergence herbicide”
Claim · model-written summary
Strategies using forage radish weed suppression should focus on fall weed suppression and the early spring preplant window of weed control.
Verbatim
e5“Strategies to use the weed suppression of forage radish cover crops should focus on fall weed suppression and the early spring preplant window of weed control”
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