Abstract
Abstract Increased use of winter legume cover crops has renewed interest in legume N mineralization patterns. This study was conducted to monitor the residual effect of a hairy vetch ( Vicia villosa Roth) cover crop and fertilizer N on surface soil NO 3 ‐N concentration in no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska on a Nora silty clay loam (fine‐silty, mixed, mesic Udic Halplustoll). The experimental design was a split‐split‐split plot with three replicates. Main plots of conventional tillage and no‐till were split into 0, 67, and 134 kg N ha −1 with and without hairy vetch. Soil samples were taken from the 0− to 7.5− and 7.5− to 15−cm depths five times during the 1987 growing season and three times in 1988. Inclusion of a hairy vetch cover crop interseeded during the previous growing season increased soil NO 3 ‐N concentration in the surface 7.5 cm between 50 and 64 d after corn planting and in the 7.5‐ to 15‐cm soil layer between 50 and 78 d after corn planting during 1987. In 1988 (a dry growing season), hairy vetch did not significantly increase soil NO 3 ‐N concentration in the 0‐ to 7.5‐cm soil layer at any sampling time, but did increase soil NO 3 ‐N concentration in the 7.5‐ to 15‐cm depth 103 d after planting. This increase in soil NO 3 ‐N concentration occurred in hairy vetch plots after silking, which probably resulted in the additional N not being available for plant growth in 1988. Increased available N resulting from a legume cover crop like hairy vetch may be beneficial in N management programs in lower rainfall areas of the USA when amounts of precipitation are adequate for plant growth and N mineralization.
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Claims 6
Claim · model-written summary
Interseeded hairy vetch cover crop increased surface soil NO3-N concentration between 50 and 64 days after corn planting.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- Inclusion of a hairy vetch cover crope1
- Outcome
- soil NO 3 ‐N concentratione1
- Direction
- increasede1
- Qualifier
- in the surface 7.5 cm between 50 and 64 d after corn plantinge1
- Setting
- northeastern Nebraskae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska”
e1“Inclusion of a hairy vetch cover crop interseeded during the previous growing season increased soil NO 3 ‐N concentration in the surface 7.5 cm between 50 and 64 d after corn planting”
Claim · model-written summary
Interseeded hairy vetch cover crop increased NO3-N concentration in the 7.5 to 15 cm layer between 50 and 78 days after corn planting in 1987.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Inclusion of a hairy vetch cover crope2
- Outcome
- soil NO 3 ‐N concentratione2
- Direction
- increasede2
- Qualifier
- in the 7.5‐ to 15‐cm soil layer between 50 and 78 d after corn planting during 1987e2
- Setting
- northeastern Nebraskae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska”
e2“Inclusion of a hairy vetch cover crop interseeded during the previous growing season increased soil NO 3 ‐N concentration in the surface 7.5 cm between 50 and 64 d after corn planting and in the 7.5‐ to 15‐cm soil layer between 50 and 78 d after corn planting during 1987”
Claim · model-written summary
In 1988 a dry growing season, hairy vetch did not significantly increase surface (0 to 7.5 cm) soil NO3-N at any sampling time.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- hairy vetche3
- Outcome
- soil NO 3 ‐N concentratione3
- Direction
- did not significantly increasee3
- Qualifier
- in the 0‐ to 7.5‐cm soil layer at any sampling timee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska”
e3“In 1988 (a dry growing season), hairy vetch did not significantly increase soil NO 3 ‐N concentration in the 0‐ to 7.5‐cm soil layer at any sampling time, but did increase soil NO 3 ‐N concentration in the 7.5‐ to 15‐cm depth 103 d after planting”
Claim · model-written summary
In 1988 hairy vetch increased soil NO3-N in the 7.5 to 15 cm depth 103 days after planting.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- hairy vetche3
- Outcome
- soil NO 3 ‐N concentratione3
- Direction
- did increasee3
- Qualifier
- 7.5‐ to 15‐cm depth 103 d after plantinge3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska”
e3“In 1988 (a dry growing season), hairy vetch did not significantly increase soil NO 3 ‐N concentration in the 0‐ to 7.5‐cm soil layer at any sampling time, but did increase soil NO 3 ‐N concentration in the 7.5‐ to 15‐cm depth 103 d after planting”
Claim · model-written summary
Hairy vetch increase in soil NO3-N after silking probably left additional N unavailable for plant growth in 1988.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- not being available for plant growthe5
- Qualifier
- occurred in hairy vetch plots after silkinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“no‐till and conventional‐till corn ( Zea mays L.) in northeastern Nebraska”
e5“This increase in soil NO 3 ‐N concentration occurred in hairy vetch plots after silking, which probably resulted in the additional N not being available for plant growth in 1988”
Claim · model-written summary
Legume cover crops such as hairy vetch may be beneficial in N management programs in lower rainfall areas of the USA when precipitation is adequate.
- Taxon
- hairy vetch
Vicia villosae6 - Outcome
- may be beneficial in N management programse6
- Qualifier
- in lower rainfall areas of the USA when amounts of precipitation are adequate for plant growth and N mineralizatione6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Increased available N resulting from a legume cover crop like hairy vetch may be beneficial in N management programs in lower rainfall areas of the USA when amounts of precipitation are adequate for plant growth and N mineralization”
The same questions in other papers
Vicia villosa · molecular: metabolites · Zea mays (maize)Results agree
1 paper in the same direction as this paper
- positive
cover crop · molecular: metabolites · Zea mays (maize)Positive and negative results
4 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- negative
7 papers more in this group
See all 11 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.