Abstract
The effect of tillage and added nitrogen fertilizer on first- and second-year corn after an established alfalfa stand was investigated in field studies near Woodstock, Ontario, Five rates of nitrogen fertilizer, ranging from 0 to 160 kg ha −1 , were evaluated to determine their influence on corn growth and yield in both no-till and conventional tillage systems in the first and second years of corn following alfalfa. In the first year of corn after alfalfa, grain yield and harvest index were significantly lower with no-till than with conventional tillage only in 1988. First-year grain yields were independent of nitrogen fertilizer rates in both 1988 and 1989. There was no tillage by nitrogen rate interaction in either year indicating that additional nitrogen fertilizer was not required to achieve optimum corn yields with no-till relative to conventional tillage. Yields of second-year corn increased with nitrogen rate in both 1989 and 1990. Tillage systems had no apparent influence on nitrogen availability to corn grown after an established alfalfa stand. Key words: Tillage, alfalfa, nitrogen
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Claims 7
Claim · model-written summary
First year no till reduced grain yield in 1988.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- no-tille0
- Outcome
- grain yielde0
- Direction
- lowere0
- Qualifier
- 1988e0
- Comparator
- conventional tillagee0
- Setting
- near Woodstock, Ontarioe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first year of corn after alfalfa, grain yield and harvest index were significantly lower with no-till than with conventional tillage only in 1988”
e1“field studies near Woodstock, Ontario”
Claim · model-written summary
First year no till reduced harvest index in 1988.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- no-tille0
- Outcome
- harvest indexe0
- Direction
- lowere0
- Qualifier
- 1988e0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the first year of corn after alfalfa, grain yield and harvest index were significantly lower with no-till than with conventional tillage only in 1988”
Claim · model-written summary
First year grain yields did not depend on nitrogen rate in 1988 or 1989.
- Taxon
- cornZea mays subsp. mayst1
- Treatment
- nitrogen fertilizer ratese0
- Outcome
- First-year grain yieldse0
- Direction
- independente0
- Qualifier
- 1988 and 1989e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“First-year grain yields were independent of nitrogen fertilizer rates in both 1988 and 1989”
t1“corn (Zea mays L.)”
Claim · model-written summary
Tillage and nitrogen rate did not interact in either year.
- Taxon
- cornZea mays subsp. mayst1
- Outcome
- tillage by nitrogen rate interactione0
- Direction
- noe0
- Qualifier
- either yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no tillage by nitrogen rate interaction in either year”
t1“corn (Zea mays L.)”
Claim · model-written summary
Second year corn yield increased with nitrogen rate in 1989 and 1990.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- nitrogen ratee0
- Outcome
- Yields of second-year corne0
- Direction
- increasede0
- Qualifier
- 1989 and 1990e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yields of second-year corn increased with nitrogen rate in both 1989 and 1990”
Claim · model-written summary
Tillage did not appear to influence nitrogen availability to corn after alfalfa.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Tillage systemse0
- Outcome
- nitrogen availability to corne0
- Direction
- no apparent influencee0
- Qualifier
- after an established alfalfa stande0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tillage systems had no apparent influence on nitrogen availability to corn grown after an established alfalfa stand”
Claim · model-written summary
Additional nitrogen was not required to optimize no till yield relative to conventional tillage.
- Taxon
- cornZea mays subsp. mayse0
- Outcome
- additional nitrogen fertilizer was not requirede0
- Comparator
- conventional tillagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“additional nitrogen fertilizer was not required to achieve optimum corn yields with no-till relative to conventional tillage”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
286 papers in the same direction as this paper · 812 in the opposite direction
- positive
- positive
- positive
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See all 1,099 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.