Abstract
SUMMARY Five experiments (1965–9) on calcareous sandy loam tested all combinations of four amounts of nitrogen (0–1·8 cwt/acre N) and four plant populations (8000–54 000 plants/ acre) given to sugar beet grown with and without irrigation. On average, nitrogen and plant population influenced yields greatly but irrigation relatively little. In all years between 0·6 and 1·2 cwt/acre N and between 17000 and 32000 plants/acre gave largest sugar yield. Giving more nitrogen or increasing the plant population neither increased nor decreased sugar yield much in any year. Irrigation was beneficial in only two out of five years. Sugar yield was linearly related to root dry-matter yield. Although total dry matter was greatest when the largest plant population was given the largest dressing of nitrogen and irrigation, the proportion of dry matter in the roots was decreased by all three factors.
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Claims 13
Claim · model-written summary
Nitrogen greatly influenced sugar beet yields.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- nitrogene0
- Outcome
- yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On average, nitrogen and plant population influenced yields greatly but irrigation relatively little.”
t0“sugar beet”
Claim · model-written summary
Plant population greatly influenced sugar beet yields.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- plant populatione0
- Outcome
- yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On average, nitrogen and plant population influenced yields greatly but irrigation relatively little.”
t0“sugar beet”
Claim · model-written summary
Irrigation influenced sugar beet yields relatively little on average.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- yieldse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On average, nitrogen and plant population influenced yields greatly but irrigation relatively little.”
t0“sugar beet”
Claim · model-written summary
Nitrogen rates of 0·6 to 1·2 cwt/acre N gave the largest sugar yield in all years.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- between 0·6 and 1·2 cwt/acre Ne0
- Outcome
- sugar yielde0
- Direction
- largeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all years between 0·6 and 1·2 cwt/acre N and between 17000 and 32000 plants/acre gave largest sugar yield.”
t0“sugar beet”
Claim · model-written summary
Populations of 17000 to 32000 plants per acre gave the largest sugar yield in all years.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- between 17000 and 32000 plants/acree0
- Outcome
- sugar yielde0
- Direction
- largeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In all years between 0·6 and 1·2 cwt/acre N and between 17000 and 32000 plants/acre gave largest sugar yield.”
t0“sugar beet”
Claim · model-written summary
More nitrogen changed sugar yield little in any year.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- more nitrogene0
- Outcome
- sugar yielde0
- Direction
- neither increased nor decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giving more nitrogen or increasing the plant population neither increased nor decreased sugar yield much in any year.”
t0“sugar beet”
Claim · model-written summary
Increasing plant population changed sugar yield little in any year.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- increasing the plant populatione0
- Outcome
- sugar yielde0
- Direction
- neither increased nor decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Giving more nitrogen or increasing the plant population neither increased nor decreased sugar yield much in any year.”
t0“sugar beet”
Claim · model-written summary
Irrigation benefited sugar beet yield in only two of five years.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Irrigatione0
- Outcome
- beneficiale0
- Direction
- beneficiale0
- Value
- two out of five yearse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation was beneficial in only two out of five years.”
t0“sugar beet”
Claim · model-written summary
Sugar yield had a linear relation with root dry-matter yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- roote0
- Outcome
- Sugar yielde0
- Comparator
- root dry-matter yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar yield was linearly related to root dry-matter yield.”
t0“sugar beet”
Claim · model-written summary
Total dry matter was greatest at the highest planting density, nitrogen dressing and irrigation.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- largest plant population was given the largest dressing of nitrogen and irrigatione0
- Outcome
- total dry mattere0
- Direction
- greateste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although total dry matter was greatest when the largest plant population was given the largest dressing of nitrogen and irrigation, the proportion of dry matter in the roots was decreased by all three factors.”
t0“sugar beet”
Claim · model-written summary
Larger plant population decreased the share of dry matter in roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- largest plant populatione0
- Outcome
- proportion of dry matter in the rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although total dry matter was greatest when the largest plant population was given the largest dressing of nitrogen and irrigation, the proportion of dry matter in the roots was decreased by all three factors.”
t0“sugar beet”
Claim · model-written summary
Higher nitrogen dressing decreased the share of dry matter in roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- largest dressing of nitrogene0
- Outcome
- proportion of dry matter in the rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although total dry matter was greatest when the largest plant population was given the largest dressing of nitrogen and irrigation, the proportion of dry matter in the roots was decreased by all three factors.”
t0“sugar beet”
Claim · model-written summary
Irrigation decreased the share of dry matter in roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- proportion of dry matter in the rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Although total dry matter was greatest when the largest plant population was given the largest dressing of nitrogen and irrigation, the proportion of dry matter in the roots was decreased by all three factors.”
t0“sugar beet”
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