Abstract
SUMMARY The use of the correct N dressing for beet is important, as any excess decreases juice purity and profit, and may decrease sugar yield, but no analytical method will at present predict the best dressing in any particular field. The concentration of nitrate in leaves and petioles of beet was determined to test if it would determine the need for top-dressings of N. Beet on seventeen field trials in 3 years testing N were sampled. Nitrate in a wet tissue extract was determined by reducing to ammonia with titanous sulphate and subsequent distillation. The petiole nitrate concentration decreased sharply with time, from around 1000 ppm in wet tissue in early June to less than 100 ppm in early September. The nitrate concentrations were closely related to nitrogen dressing, and the rapid decline in concentration was decreased by top-dressings. Comparison of samples taken in June showed that most of the variation between the experiments could be accounted for by the different ages of the plants. Sodium fertilizer had no effect on nitrate content. Petiole nitrate was inversely related to juice purity and sugar concentration, especially when the nitrate content exceeded 700 ppm in June. On average, petiole nitrate concentrations about 800 ppm in June were associated with the largest sugar yields, but the content could not be used to predict nitrogen top-dressing requirement accurately at individual sites. Measuring NO 3 -N cannot at present be recommended as a method for deciding how much nitrogen fertilizer to use, but it has value for detecting severe deficiencies and in research.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 11
Claim · model-written summary
Petiole nitrate declined between early June and early September.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Organ / stage
- petiolee0
- Outcome
- petiole nitrate concentratione0
- Direction
- decreased sharplye0
- Value
- around 1000 ppm in wet tissue in early June to less than 100 ppm in early Septembere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The petiole nitrate concentration decreased sharply with time, from around 1000 ppm in wet tissue in early June to less than 100 ppm in early September”
t0“sugar beet”
Claim · model-written summary
Nitrate concentrations were closely related to nitrogen dressing.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- nitrogen dressinge0
- Outcome
- nitrate concentrationse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The nitrate concentrations were closely related to nitrogen dressing”
t0“sugar beet”
Claim · model-written summary
Top dressing slowed the decline in nitrate concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- top-dressingse0
- Outcome
- rapid decline in concentratione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the rapid decline in concentration was decreased by top-dressings”
t0“sugar beet”
Claim · model-written summary
Plant age accounted for most interexperiment variation in June samples.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- different ages of the plantse0
- Outcome
- variation between the experimentse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of the variation between the experiments could be accounted for by the different ages of the plants”
t0“sugar beet”
Claim · model-written summary
Sodium fertilizer did not affect nitrate content.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Sodium fertilizere0
- Outcome
- nitrate contente0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sodium fertilizer had no effect on nitrate content”
t0“sugar beet”
Claim · model-written summary
Petiole nitrate was inversely related to juice purity, especially above 700 ppm in June.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- Petiole nitratee0
- Outcome
- juice puritye0
- Direction
- inverselye0
- Qualifier
- nitrate content exceeded 700 ppm in Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Petiole nitrate was inversely related to juice purity and sugar concentration, especially when the nitrate content exceeded 700 ppm in June”
t0“sugar beet”
Claim · model-written summary
Petiole nitrate was inversely related to sugar concentration, especially above 700 ppm in June.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- Petiole nitratee0
- Outcome
- sugar concentratione0
- Direction
- inverselye0
- Qualifier
- nitrate content exceeded 700 ppm in Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Petiole nitrate was inversely related to juice purity and sugar concentration, especially when the nitrate content exceeded 700 ppm in June”
t0“sugar beet”
Claim · model-written summary
About 800 ppm petiole nitrate in June was associated with the largest sugar yields on average.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Compound
- petiole nitrate concentrationse0
- Outcome
- sugar yieldse0
- Direction
- largeste0
- Value
- about 800 ppm in Junee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On average, petiole nitrate concentrations about 800 ppm in June were associated with the largest sugar yields”
t0“sugar beet”
Claim · model-written summary
Petiole nitrate did not accurately predict nitrogen top dressing requirement at individual sites.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- predict nitrogen top-dressing requirement accuratelye0
- Qualifier
- at individual sitese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the content could not be used to predict nitrogen top-dressing requirement accurately at individual sites”
t0“sugar beet”
Claim · model-written summary
The authors do not recommend NO 3 -N measurement for deciding nitrogen fertilizer quantity.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- Measuring NO 3 -N cannot at present be recommended as a method for deciding how much nitrogen fertilizer to usee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Measuring NO 3 -N cannot at present be recommended as a method for deciding how much nitrogen fertilizer to use”
t0“sugar beet”
Claim · model-written summary
NO 3 -N measurement has value for detecting severe deficiencies and in research.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- detecting severe deficiencies and in researche0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it has value for detecting severe deficiencies and in research”
e1“Measuring NO 3 -N cannot at present be recommended as a method for deciding how much nitrogen fertilizer to use”
t0“sugar beet”
The same questions in other papers
sodium atom · nutrient: content · Beta vulgaris (beet)Results agree
1 paper in the same direction as this paper
- negative
fertilization · nutrient: content · Beta vulgaris (beet)Positive and negative results
12 papers in the same direction as this paper · 46 in the opposite direction
- positive
- positive
- positive
55 papers more in this group
See all 59 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.