Abstract
SUMMARY The concentration of nitrogen, phosphorus, potassium, sodium, calcium and magnesium was measured in the dry matter of sugar beet from four field experiments (1966–9). All combinations of four amounts of nitrogen fertilizer (0–1·8 cwt/acre), four plant populations (8800–54000 plants/acre) and irrigation were tested, which gave a wide range of plant size and yield. Nutrient concentration and uptake by the crop were also greatly affected by the treatments. Nitrogen fertilizer and irrigation increased uptake of nitrogen by the crop but increasing the plant population had little effect on uptake and decreased the concentration of nitrogen. Sugar yield was related to the total nitrogen concentration in tops and roots and to uptake. There were optimal values of nitrogen concentration for maximal sugar yield, but the optima were greatly affected by plant population. Leaf colour was a good guide to nitrogen concentration. Phosphorus concentration was affected little by the treatments but cation concentrations were greatly affected. In general, uptake of all the elements was increased by all treatments – the exception was sodium, which decreased as the plant population increased but this was balanced to somo extent by increased potassium uptake.
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Claims 12
Claim · model-written summary
Nitrogen fertilizer increased nitrogen uptake by sugar beet.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Nitrogen fertilizere0
- Outcome
- uptake of nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Nitrogen fertilizer and irrigation increased uptake of nitrogen by the crop”
Claim · model-written summary
Irrigation increased nitrogen uptake by sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- uptake of nitrogene0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Nitrogen fertilizer and irrigation increased uptake of nitrogen by the crop”
Claim · model-written summary
Increasing plant population had little effect on sugar beet nitrogen uptake.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing the plant populatione0
- Outcome
- uptakee0
- Direction
- little effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“increasing the plant population had little effect on uptake and decreased the concentration of nitrogen.”
Claim · model-written summary
Increasing plant population decreased sugar beet nitrogen concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing the plant populatione0
- Outcome
- concentration of nitrogene0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“increasing the plant population had little effect on uptake and decreased the concentration of nitrogen.”
Claim · model-written summary
Sugar yield was related to nitrogen concentration in tops and roots and nitrogen uptake.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- tops and rootse0
- Compound
- nitrogene0
- Outcome
- Sugar yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Sugar yield was related to the total nitrogen concentration in tops and roots and to uptake.”
Claim · model-written summary
Optimal nitrogen concentrations for maximal sugar yield depended strongly on plant population.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- plant populatione0
- Compound
- nitrogene0
- Outcome
- maximal sugar yielde0
- Direction
- maximale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“There were optimal values of nitrogen concentration for maximal sugar yield, but the optima were greatly affected by plant population.”
Claim · model-written summary
Leaf colour was a good guide to nitrogen concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- Leafe0
- Outcome
- nitrogen concentratione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Leaf colour was a good guide to nitrogen concentration.”
Claim · model-written summary
Treatments had little effect on phosphorus concentration.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- treatmentse0
- Outcome
- Phosphorus concentratione0
- Direction
- affected littlee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Phosphorus concentration was affected little by the treatments but cation concentrations were greatly affected.”
Claim · model-written summary
Treatments greatly affected cation concentrations.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- treatmentse0
- Outcome
- cation concentrationse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Phosphorus concentration was affected little by the treatments but cation concentrations were greatly affected.”
Claim · model-written summary
Treatments generally increased elemental uptake.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- all treatmentse0
- Outcome
- uptake of all the elementse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“In general, uptake of all the elements was increased by all treatments”
Claim · model-written summary
Increasing plant population decreased sodium uptake.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- plant population increasede0
- Outcome
- sodiume0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“the exception was sodium, which decreased as the plant population increased”
Claim · model-written summary
Increased potassium uptake balanced the decrease in sodium uptake to some extent.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- potassium uptakee0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“this was balanced to somo extent by increased potassium uptake.”
The same questions in other papers
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See all 7 papers →irrigation · nutrient: content · Beta vulgaris (beet)Positive and negative results
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- no effect
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See all 8 papers →fertilization · nutrient: content · Beta vulgaris (beet)Positive and negative results
45 papers in the same direction as this paper · 13 in the opposite direction
- negative
- no effect
- no effect
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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.