Abstract
Abstract Sweet corn ( Zea mays L.) was grown to evaluate the effect of N source, N rate, time of N application, and the nitrification inhibitor, 2-chloro-6-(trichloromethyl) pyridine (nitrapyrin), on crop efficiency and movement of applied N on a Kanapaha fine sand. Sweet corn yield was not affected by nitrapyrin rates of 0, 0.56, and 1.12 kg/ha, during 2 seasons. During a wet 1976 summer season, total yield was 65% higher with N applied as (NH 4 ) 2 SO 4 than as Ca(NO 3 ) 2 . Total yield increased linearly from 6. 1 to 9.8 MT/ha with an increase in N rate from 56 to 224 kg/ha as (NH 4 )SO 4 . With Ca(NO 3 ) 2 , total yield averaged 4.9 MT/ha and was not influenced by N rate. During the drier 1977 spring season, marketable yield was not influenced by N source. Total yield increased linearly from 9.1 to 14.6 MT/ha with an increase in N rate. In the wetter season, the application of N in split rather than single applications as Ca(NO 3 ) 2 increased yield. During the dry season, timing of N application had no effect on yield with either N source. The suppressing action of NH 4 -N absorption on the absorption of other cations was evident but was not consistent throughout the study. The application of (NH 4 ) 2 SO 4 as compared to Ca(NO 3 ) 2 resulted in higher plant dry weights at an early sampling stage in the wet season but not during the dry season. Higher soil N (NH 4 -N + NO 3 -N) levels were maintained above a 20-cm soil depth with (NH 4 ) 2 SO 4 than with Ca(NO 3 ) 2 during the wet season.
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Claims 12
Claim · model-written summary
Nitrapyrin rates did not significantly affect sweet corn yield over two seasons.
- Taxon
- Sweet corne0
- Treatment
- nitrapyrin rates of 0, 0.56, and 1.12 kg/hae0
- Outcome
- Sweet corn yielde0
- Direction
- not affectede0
- Qualifier
- during 2 seasonse0
Not reportedComparator
Verbatim
e0“Sweet corn yield was not affected by nitrapyrin rates of 0, 0.56, and 1.12 kg/ha, during 2 seasons.”
Claim · model-written summary
Ammonium sulfate raised total yield 65% relative to calcium nitrate in the wet 1976 summer.
Verbatim
e0“During a wet 1976 summer season, total yield was 65% higher with N applied as (NH 4 ) 2 SO 4 than as Ca(NO 3 ) 2 .”
t0“Sweet Corn”
Claim · model-written summary
Total yield increased linearly from 6.1 to 9.8 MT/ha as ammonium sulfate nitrogen rate rose from 56 to 224 kg/ha.
- Taxon
- Sweet cornt0
- Treatment
- N rate from 56 to 224 kg/ha as (NH 4 )SO 4e0
- Outcome
- Total yielde0
- Direction
- increasede0
- Value
- 6. 1 to 9.8 MT/hae0
Not reportedComparator
Verbatim
e0“Total yield increased linearly from 6. 1 to 9.8 MT/ha with an increase in N rate from 56 to 224 kg/ha as (NH 4 )SO 4 .”
t0“Sweet Corn”
Claim · model-written summary
With calcium nitrate, total yield averaged 4.9 MT/ha and did not vary with nitrogen rate.
- Taxon
- Sweet cornt0
- Treatment
- N ratee0
- Outcome
- total yielde0
- Direction
- not influencede0
- Value
- 4.9 MT/hae0
- Qualifier
- Ca(NO 3 ) 2e0
Not reportedComparator
Verbatim
e0“With Ca(NO 3 ) 2 , total yield averaged 4.9 MT/ha and was not influenced by N rate.”
t0“Sweet Corn”
Claim · model-written summary
Nitrogen source did not affect marketable yield in the drier 1977 spring.
- Taxon
- Sweet cornt0
- Treatment
- N sourcee0
- Outcome
- marketable yielde0
- Direction
- not influencede0
- Qualifier
- drier 1977 spring seasone0
Not reportedComparator
Verbatim
e0“During the drier 1977 spring season, marketable yield was not influenced by N source.”
t0“Sweet Corn”
Claim · model-written summary
In the dry season, total yield rose linearly from 9.1 to 14.6 MT/ha as nitrogen rate increased.
Not reportedComparator
Verbatim
e0“Total yield increased linearly from 9.1 to 14.6 MT/ha with an increase in N rate.”
t0“Sweet Corn”
Claim · model-written summary
Split calcium nitrate applications increased yield relative to one application in the wetter season.
Verbatim
e0“In the wetter season, the application of N in split rather than single applications as Ca(NO 3 ) 2 increased yield.”
t0“Sweet Corn”
Claim · model-written summary
Nitrogen application timing did not affect yield with either source in the dry season.
- Taxon
- Sweet cornt0
- Treatment
- timing of N applicatione0
- Outcome
- yielde0
- Direction
- no effecte0
- Qualifier
- either N sourcee0
Not reportedComparator
Verbatim
e0“During the dry season, timing of N application had no effect on yield with either N source.”
t0“Sweet Corn”
Claim · model-written summary
Ammonium nitrogen absorption suppressed other cation absorption inconsistently across the study.
Verbatim
e0“The suppressing action of NH 4 -N absorption on the absorption of other cations was evident but was not consistent throughout the study.”
t0“Sweet Corn”
Claim · model-written summary
Ammonium sulfate increased early plant dry weight relative to calcium nitrate in the wet season.
Verbatim
e0“The application of (NH 4 ) 2 SO 4 as compared to Ca(NO 3 ) 2 resulted in higher plant dry weights at an early sampling stage in the wet season but not during the dry season.”
t0“Sweet Corn”
Claim · model-written summary
Ammonium sulfate did not increase early plant dry weight relative to calcium nitrate in the dry season.
Verbatim
e0“The application of (NH 4 ) 2 SO 4 as compared to Ca(NO 3 ) 2 resulted in higher plant dry weights at an early sampling stage in the wet season but not during the dry season.”
t0“Sweet Corn”
Claim · model-written summary
Ammonium sulfate maintained higher soil nitrogen above 20 cm depth than calcium nitrate in the wet season.
Verbatim
e0“Higher soil N (NH 4 -N + NO 3 -N) levels were maintained above a 20-cm soil depth with (NH 4 ) 2 SO 4 than with Ca(NO 3 ) 2 during the wet season.”
t0“Sweet Corn”
The same questions in other papers
nitrapyrin · yield · Zea mays (maize)Results differ
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See all 2,185 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.