Abstract
A three-year (2004-2006) field trial was carried out to compare two agricultural land management systems, in the Po Valley (Northern Italy). Conventional tillage and No-tillage (hereafter indicated as CT and NT, respectively) were compared for maize treated with three levels of nitrogen. The soil was a fine-loamy, mixed, mesic Ultic Haplustalf, that had been under processing tomato in the previous year. Experimental design was a split-plot with four replicates, with the management system as the main factor and nitrogen fertilization (0, 250 and 300 kg N ha-1 year-1) as the secondary factor. Cumulative 3-yr yields of grain and total biomass of NT maize plants were 8% lower than those obtained under CT management, but not significantly different. No N starter was distributed in the first conversion year, causing 17% less grain yield in the NT plots compared with the CT plots. The N fertilizing with 250 and 300 kg N ha-1 year-1 determined statistically equal grain yields, demonstrating the waste of the extra 50 kg N at the N2 rate. Overall, the results for the three years indicate that on an Ultic Haplustalf conversion from a ploughed regime to mature NT conditions could be achieved over a relatively short period.
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Claims 5
Claim · model-written summary
No-tillage maize had 8% lower cumulative three-year grain and total biomass yields than conventional tillage, not significantly different.
- Treatment
- No-tillagee1
- Outcome
- Cumulative 3-yr yields of grain and total biomasse2
- Direction
- lowere2
- Value
- 8%e2
- Comparator
- Conventional tillagee1
- Setting
- Po Valley (Northern Italy)e0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A three-year (2004-2006) field trial was carried out to compare two agricultural land management systems, in the Po Valley (Northern Italy)”
e1“Conventional tillage and No-tillage (hereafter indicated as CT and NT, respectively) were compared for maize treated with three levels of nitrogen”
e2“Cumulative 3-yr yields of grain and total biomass of NT maize plants were 8% lower than those obtained under CT management, but not significantly different”
Claim · model-written summary
Without a N starter in the first conversion year, no-tillage plots had 17% less grain yield than conventional tillage plots.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Conventional tillage and No-tillage (hereafter indicated as CT and NT, respectively) were compared for maize treated with three levels of nitrogen”
e3“No N starter was distributed in the first conversion year, causing 17% less grain yield in the NT plots compared with the CT plots”
Claim · model-written summary
Fertilization with 250 and 300 kg N ha-1 year-1 gave statistically equal grain yields.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Conventional tillage and No-tillage (hereafter indicated as CT and NT, respectively) were compared for maize treated with three levels of nitrogen”
e4“The N fertilizing with 250 and 300 kg N ha-1 year-1 determined statistically equal grain yields, demonstrating the waste of the extra 50 kg N at the N2 rate”
Claim · model-written summary
The extra 50 kg N at the N2 rate is wasted.
- Outcome
- waste of the extra 50 kg N at the N2 ratee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Monoculture Maize”
e4“demonstrating the waste of the extra 50 kg N at the N2 rate”
Claim · model-written summary
Conversion from a ploughed regime to mature no-tillage conditions could be achieved over a relatively short period on an Ultic Haplustalf.
- Outcome
- conversion from a ploughed regime to mature NT conditionse5
- Qualifier
- over a relatively short periode5
- Setting
- Ultic Haplustalfe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Monoculture Maize”
e5“Overall, the results for the three years indicate that on an Ultic Haplustalf conversion from a ploughed regime to mature NT conditions could be achieved over a relatively short period”
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