Abstract
SUMMARY Three preliminary experiments at Cambridge (1904–70) indicated that several varieties and breeding lines of sugar beet differed in their response to fertilizers. Three factorial experiments were therefore made at Broom's Barn (1970–2) to measure response by four widely differing varieties of sugar beet (Sharpe's Klein ‘E’, Maris Vanguard, V.T.137 and Anglo-Maribo Poly) to nitrogen (0, 75 and 150kgN/ha), sodium (0 and 250 kg N/ha) and potassium (0 and 400 kg K/ha) fertilizers. Increases in sugar yield from 75 kg N/ha by each of the varieties were remarkably similar and giving a further 75 kg N/ha neither increased nor decreased the yield of any variety on average over the three experiments. The yield response to sodium and potassium was greatest in Sharpe's Klein ‘E’ and least in V.T.137; however, as with nitrogen, varieties responded inconsistently from year to year and the interactions were not statistically significant for data pooled over the three experiments. These experiments indicate that varietal differences in fertilizer requirement are unlikely to be important in commercial practice.
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Claims 8
Claim · model-written summary
Sugar beet varieties and breeding lines differed in fertilizer responses in preliminary experiments.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Material
- varieties and breeding linese0
- Outcome
- response to fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“several varieties and breeding lines of sugar beet differed in their response to fertilizers”
Claim · model-written summary
An application of 75 kg N/ha increased sugar yield similarly across the varieties.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- 75 kg N/hae0
- Outcome
- sugar yielde0
- Direction
- Increasese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increases in sugar yield from 75 kg N/ha by each of the varieties were remarkably similar”
e1“varieties of sugar beet”
Claim · model-written summary
A further 75 kg N/ha did not change mean sugar yield of any variety across the three experiments.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Treatment
- further 75 kg N/hae0
- Outcome
- yield of any varietye0
- Direction
- neither increased nor decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“giving a further 75 kg N/ha neither increased nor decreased the yield of any variety on average over the three experiments”
e1“varieties of sugar beet”
Claim · model-written summary
Sodium yield response was greatest in Sharpe's Klein ‘E’ and least in V.T.137.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Material
- Sharpe's Klein ‘E’e0
- Outcome
- yield response to sodiume0
- Direction
- greateste0
- Comparator
- V.T.137e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response to sodium and potassium was greatest in Sharpe's Klein ‘E’ and least in V.T.137”
e1“varieties of sugar beet”
Claim · model-written summary
Potassium yield response was greatest in Sharpe's Klein ‘E’ and least in V.T.137.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Material
- Sharpe's Klein ‘E’e0
- Outcome
- yield response to sodium and potassiume0
- Direction
- greateste0
- Comparator
- V.T.137e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield response to sodium and potassium was greatest in Sharpe's Klein ‘E’ and least in V.T.137”
e1“varieties of sugar beet”
Claim · model-written summary
Varietal responses to nitrogen, sodium and potassium varied inconsistently across years.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Outcome
- responded inconsistently from year to yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“varieties responded inconsistently from year to year”
e1“varieties of sugar beet”
Claim · model-written summary
Pooled fertilizer-by-variety interactions were not statistically significant.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Outcome
- interactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the interactions were not statistically significant for data pooled over the three experiments”
e1“varieties of sugar beet”
Claim · model-written summary
The authors concluded that varietal fertilizer-requirement differences are unlikely to matter commercially.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise1
- Outcome
- varietal differences in fertilizer requiremente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“varietal differences in fertilizer requirement are unlikely to be important in commercial practice”
e1“varieties of sugar beet”
The same questions in other papers
nitrogen · quality: sugar starch · Beta vulgaris (beet)Results differ
65 papers in the same direction as this paper · 36 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- negative
99 papers more in this group
See all 103 papers →nitrogen · yield · Beta vulgaris (beet)Positive and negative results
18 papers in the same direction as this paper · 142 in the opposite direction
- positive
- positive
- positive
157 papers more in this group
See all 161 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.