Abstract
A split-plot factorial experiment examined effects of tillage and winter cover crops on sweet corn. Main plots received tillage or no tillage. Cover crops consisted of hairy vetch, winter rye, or a mix, and N treatments consisted of plus or minus N fertilization. No significant effects of tillage on sweet corn yields were detected. Following corn not receiving inorganic N, vetch produced cover crop total N yields of 130 kg·ha –1 that were over three-times greater than those obtained with rye. Following rye winter covercrops, addition of ammonium nitrate to corn significantly ( P < 0.05) increased corn yields and foliar N concentrations compared to treatments not receiving N. However, following vetch, corn yields and foliar N concentrations obtained without N fertilization equaled those obtained with N fertilization following rye or vetch. Available soil N was significantly ( P < 0.05) greater following vetch compared to rye for ≈9 weeks after corn planting and peaked ≈4 weeks after planting. It was concluded that no-tillage sweet corn was successful and N fixed by vetch was able to sustain sweet corn production.
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Claims 7
Claim · model-written summary
Tillage had no significant effect on sweet corn yields.
Not reportedComparator
Verbatim
e1“No significant effects of tillage on sweet corn yields were detected”
Claim · model-written summary
Where corn received no inorganic N, vetch cover crops produced total N yields of 130 kg/ha, over three times greater than rye.
Verbatim
e1“vetch produced cover crop total N yields of 130 kg·ha –1 that were over three-times greater than those obtained with rye”
Claim · model-written summary
Following rye cover crops, ammonium nitrate addition to corn significantly increased corn yields and foliar N concentrations compared with no N.
- Taxon
- corn
Zea mays subsp. mayse1 - Treatment
- addition of ammonium nitratee1
- Outcome
- corn yields and foliar N concentrationse1
- Direction
- increasede1
- Qualifier
- Following rye winter covercropse1
- Comparator
- treatments not receiving Ne1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Following rye winter covercrops, addition of ammonium nitrate to corn significantly ( P < 0.05) increased corn yields and foliar N concentrations compared to treatments not receiving N”
Claim · model-written summary
Following vetch, corn yields and foliar N concentrations without N fertilization equaled those with N fertilization following rye or vetch.
- Taxon
- cornZea mays subsp. mayse1
- Treatment
- with N fertilizatione1
- Outcome
- corn yields and foliar N concentrationse1
- Direction
- equalede1
- Qualifier
- following vetche1
- Comparator
- without N fertilizatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“following vetch, corn yields and foliar N concentrations obtained without N fertilization equaled those obtained with N fertilization following rye or vetch”
Claim · model-written summary
Available soil N was significantly greater following vetch than rye for about 9 weeks after corn planting.
Verbatim
e1“Available soil N was significantly ( P < 0.05) greater following vetch compared to rye for ≈9 weeks after corn planting”
Claim · model-written summary
Available soil N peaked about 4 weeks after planting.
Verbatim
e1“Available soil N was significantly ( P < 0.05) greater following vetch compared to rye for ≈9 weeks after corn planting and peaked ≈4 weeks after planting”
Claim · model-written summary
The authors conclude that no-tillage sweet corn was successful and that N fixed by vetch was able to sustain sweet corn production.
Verbatim
e1“no-tillage sweet corn was successful and N fixed by vetch was able to sustain sweet corn production”
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