Abstract
Sugar beet seeders have been developed in other countries, in order to place nitrogen into the soil at a few centimeters from the seed. Placing fertilizer has proved safe for seedling emergence, successful in reducing soil residual nitrogen at harvest, sometimes even better-yielding than broadcast applications. In a 3-year research on sugar beet, spreading fertilizer on the soil surface followed by incorporation was compared with placing in rows 6 and 3 cm far from the seed ones, slightly deeper than the seed, in combination with two rates of urea-N, 60 and 120 kg ha-1, plus an unfertilized check. The course of soil mineral nitrogen and that of N-uptake were evaluated during crop cycle. Yield and quality were evaluated at harvest. Nitrogen placement close to the seed (3 cm) negatively affected crop emergence. In the plant-soil system, placement showed a higher soil N-content in the first phases and a lower plant uptake at harvest. As for yield, placement attained a slightly-lower level than broadcasting at 60 kg N ha-1 of N, almost the same at 120. No significant difference in quality was observed between the two patterns. At a certain distance from the seed, placement proved a safe way of applying fertilizer. Its yield and quality, the uptake by the plant and the amount of soil residual-N are comparable with those of broadcast fertilizer; in the case of soil nitrogen, it is perceived that the year/location effect is potentially stronger than that of rate/pattern of application.
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Claims 8
Claim · model-written summary
Nitrogen placement 3 cm from seed reduced crop emergence.
- Taxon
- Sugar Beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Nitrogen placement close to the seed (3 cm)e0
- Outcome
- crop emergencee0
- Direction
- negatively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen placement close to the seed (3 cm) negatively affected crop emergence.”
t0“Sugar Beet”
Claim · model-written summary
Placement produced higher early soil nitrogen content.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- placemente0
- Outcome
- soil N-contente0
- Direction
- highere0
- Qualifier
- in the first phasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placement showed a higher soil N-content in the first phases and a lower plant uptake at harvest.”
t0“Sugar Beet”
Claim · model-written summary
Placement produced lower plant nitrogen uptake at harvest.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- placemente0
- Outcome
- plant uptakee0
- Direction
- lowere0
- Qualifier
- at harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placement showed a higher soil N-content in the first phases and a lower plant uptake at harvest.”
t0“Sugar Beet”
Claim · model-written summary
Placement yielded slightly less than broadcasting at 60 kg N ha-1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- placemente0
- Outcome
- slightly-lower levele0
- Direction
- slightly-lowere0
- Qualifier
- 60 kg N ha-1 of Ne0
- Comparator
- broadcastinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placement attained a slightly-lower level than broadcasting at 60 kg N ha-1 of N, almost the same at 120.”
t0“Sugar Beet”
Claim · model-written summary
Placement and broadcasting yielded almost the same at 120 kg N ha-1.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- placemente0
- Outcome
- almost the samee0
- Direction
- almost the samee0
- Qualifier
- 120e0
- Comparator
- broadcastinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“placement attained a slightly-lower level than broadcasting at 60 kg N ha-1 of N, almost the same at 120.”
t0“Sugar Beet”
Claim · model-written summary
Quality did not differ significantly between placement and broadcasting.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Treatment
- two patternse0
- Outcome
- qualitye0
- Direction
- No significant differencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No significant difference in quality was observed between the two patterns.”
t0“Sugar Beet”
Claim · model-written summary
The authors judged placement at some distance from seed a safe fertilizer application method.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- placement proved a safe way of applying fertilizere0
- Qualifier
- At a certain distance from the seede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At a certain distance from the seed, placement proved a safe way of applying fertilizer.”
t0“Sugar Beet”
Claim · model-written summary
The authors considered soil nitrogen more responsive to year and location than to fertilizer rate or application pattern.
- Taxon
- Sugar BeetBeta vulgaris subsp. vulgarist0
- Outcome
- soil nitrogene0
- Qualifier
- potentially stronger than that of rate/pattern of applicatione0
- Setting
- year/locatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in the case of soil nitrogen, it is perceived that the year/location effect is potentially stronger than that of rate/pattern of application.”
t0“Sugar Beet”
The same questions in other papers
nitrogen · growth · Beta vulgaris (beet)Positive and negative results
10 papers in the same direction as this paper · 97 in the opposite direction
- positive
- positive
- positive
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See all 108 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.