Abstract
An integral component of a conservation-tillage system in corn (Zea mays L.) and cotton (Gossypium hirsutum L.) is the use of a winter cover crop. A field experiment was initiated in 2002 to evaluate winter weed dynamics following various winter cover crops in both continuous cotton and a corn and cotton rotation. Winter cover crops included black oats (Avena strigosa Schreb.); two crimson clover entries (Trifolium incarnatum L.); two cultivars of forage rape (Brassica napus L. var. napus), spring and winter; oil radish (Raphanus sativus var. oleiformis Pers.); three cultivars of turnip (Brassica rapa L. subsp. rapa); white lupin (Lupinus albus L.); and a mixture of black oat and lupin. Two-year conservation-tillage rotational sequences included conventionally tilled continuous corn and cotton winter fallow systems as controls. The 10 conservation-tillage, winter cover-crop systems investigated were three continuous cotton systems that alternated a winter legume (lupin or clover), six cotton-corn systems, where lupin preceded cotton and radish, rape, or turnip preceded corn, and a cotton-corn system that had a lupin-black oat mixture as a winter cover crop every year. Use of lupin or ‘AU Robin ’ clover resulted in weed biomass reduction of up to 80 % and 54%, respectively, in weed biomass compared to the fallow system. The highest yielding corn-cotton conservation tillage rotation with a winter cover yielded 200 lbs/acre more that the continuous cotton winter fallow system. Continuous conventional corn with winter fallow yielded 30 bu/acre less than the highest yielding 2-yr, conservation tillage winter crop system.
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Claims 4
Claim · model-written summary
Winter lupin as a cover crop reduced winter weed biomass by up to 80 % compared with the fallow system.
- Taxon
- corn (Zea mays L.) and cotton (Gossypium hirsutum L.)
Gossypium hirsutum
Zea mayse0 - Treatment
- lupine1
- Interactor
- winter weede3weed
- Outcome
- weed biomasse1
- Direction
- reductione1
- Value
- up to 80 %e1
- Comparator
- fallow systeme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) and cotton (Gossypium hirsutum L.)”
e1“Use of lupin or ‘AU Robin ’ clover resulted in weed biomass reduction of up to 80 % and 54%, respectively, in weed biomass compared to the fallow system”
e3“evaluate winter weed dynamics”
Claim · model-written summary
Clover as a winter cover crop reduced winter weed biomass by 54% compared with the fallow system.
- Taxon
- corn (Zea mays L.) and cotton (Gossypium hirsutum L.)Gossypium hirsutumZea mayse0
- Treatment
- clovere1
- Interactor
- winter weede3weed
- Outcome
- weed biomasse1
- Direction
- reductione1
- Value
- 54%e1
- Comparator
- fallow systeme1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) and cotton (Gossypium hirsutum L.)”
e1“Use of lupin or ‘AU Robin ’ clover resulted in weed biomass reduction of up to 80 % and 54%, respectively, in weed biomass compared to the fallow system”
e3“evaluate winter weed dynamics”
Claim · model-written summary
The highest yielding corn-cotton rotation with a winter cover yielded 200 lbs/acre more than continuous cotton with winter fallow.
- Taxon
- corn (Zea mays L.) and cotton (Gossypium hirsutum L.)Gossypium hirsutumZea mayse0
- Treatment
- corn-cotton conservation tillage rotation with a winter covere2
- Outcome
- yielde2
- Direction
- moree2
- Value
- 200 lbs/acree2
- Comparator
- continuous cotton winter fallow systeme2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) and cotton (Gossypium hirsutum L.)”
e2“The highest yielding corn-cotton conservation tillage rotation with a winter cover yielded 200 lbs/acre more that the continuous cotton winter fallow system”
Claim · model-written summary
Continuous conventional corn with winter fallow yielded 30 bu/acre less than the highest yielding two-year conservation-tillage winter cover system.
- Taxon
- corn (Zea mays L.) and cotton (Gossypium hirsutum L.)Gossypium hirsutumZea mayse0
- Treatment
- Continuous conventional corn with winter fallowe4
- Outcome
- yielde4
- Direction
- lesse4
- Value
- 30 bu/acree4
- Comparator
- the highest yielding 2-yr, conservation tillage winter crop systeme4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“corn (Zea mays L.) and cotton (Gossypium hirsutum L.)”
e4“Continuous conventional corn with winter fallow yielded 30 bu/acre less than the highest yielding 2-yr, conservation tillage winter crop system”
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