Abstract
ABSTRACT A study was conducted in 1999–2001 in central Maine to compare the effects of a spader plow versus a rototiller on nitrogen mineralization and growth of sweet corn (Zea mays L.) following red clover (Trifolium pratense L.). Spring wheat (Triticum aestivum L.) was established the first year of the rotation, with and without a red clover co-seeding. The following spring, clover and wheat stubble were incorporated with either a rototiller or a spader plow, which incorporates the residue deeper and with little or no chopping or tearing. Sweet corn was planted with no additional N inputs. Sweet corn growth and yield parameters were monitored, as was soil nitrate and total mineral N throughout the corn growing season. In both 2000 and 2001, sweet corn after clover yielded significantly more (p < 0.05) in all yield parameters than sweet corn after no clover. There were no significant differences in sweet corn yield parameters between the two tillage treatments in either year, although there was a consistent trend for sweet corn after clover to yield higher in rototilled plots than spaded plots. In both years total N content of corn biomass was greater in the rototilled than in the spaded treatment following clover. Soil nitrogen monitoring showed that in both 2000 and 2001, soil nitrate and total mineral N were greater early in the season under the spaded treatments. Corn grown under this treatment utilized available nitrate after clover less efficiently than in the rototilled treatment.
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Claims 6
Claim · model-written summary
Sweet corn grown after red clover yielded significantly more in all yield parameters than sweet corn after no clover in 2000 and 2001.
Verbatim
e0“growth of sweet corn (Zea mays L.)”
e1“In both 2000 and 2001, sweet corn after clover yielded significantly more (p < 0.05) in all yield parameters than sweet corn after no clover”
e2“A study was conducted in 1999–2001 in central Maine”
Claim · model-written summary
There was no significant difference in sweet corn yield parameters between rototilled and spaded tillage in either year.
Verbatim
e0“growth of sweet corn (Zea mays L.)”
e1“There were no significant differences in sweet corn yield parameters between the two tillage treatments in either year, although there was a consistent trend for sweet corn after clover to yield higher in rototilled plots than spaded plots”
Claim · model-written summary
Sweet corn after clover showed a consistent, non-significant trend to yield higher in rototilled than in spaded plots.
Verbatim
e0“growth of sweet corn (Zea mays L.)”
e1“There were no significant differences in sweet corn yield parameters between the two tillage treatments in either year, although there was a consistent trend for sweet corn after clover to yield higher in rototilled plots than spaded plots”
Claim · model-written summary
Total N content of corn biomass after clover was greater with rototilling than with spading.
- Taxon
- corn
Zea mays subsp. mayse0 - Treatment
- rototillede0
- Outcome
- total N content of corn biomasse0
- Direction
- greatere0
- Comparator
- spaded treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both years total N content of corn biomass was greater in the rototilled than in the spaded treatment following clover”
Claim · model-written summary
Soil nitrate and total mineral N were greater early in the season under the spaded treatments in both years.
- Taxon
- sweet corne0
- Treatment
- spaded treatmentse1
- Outcome
- soil nitrate and total mineral Ne1
- Direction
- greatere1
- Qualifier
- early in the seasone1
Not reportedComparator
Verbatim
e0“growth of sweet corn (Zea mays L.)”
e1“Soil nitrogen monitoring showed that in both 2000 and 2001, soil nitrate and total mineral N were greater early in the season under the spaded treatments”
Claim · model-written summary
Corn after clover utilized available nitrate less efficiently under the spaded treatment than under rototilling.
Verbatim
e0“growth of sweet corn (Zea mays L.)”
e1“Corn grown under this treatment utilized available nitrate after clover less efficiently than in the rototilled treatment”
e2“Soil nitrogen monitoring showed that in both 2000 and 2001, soil nitrate and total mineral N were greater early in the season under the spaded treatments”
The same questions in other papers
tillage · yield · Zea mays (maize)Positive and negative results
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