Abstract
SUMMARY A field experiment in each year 1963 to 1967 in Suffolk, England, tested the effect on yield of sugar beet of sowing dates ranging from 13 March to 11 May and harvest dates ranging from 20 September to 8 December. Sowings in March or early April gave similar yields of sugar but with later sowings yield decreased progressively faster. The relationship is represented by the equation y = 106·3 (±2·24) + 0·212 (±0·184) x -0·009 (±0·003) x 2 , y = yield as percentage of mean (60·1 cwt/acre of sugar), x = number of days after 12 March. Delayed harvest increased sugar yield; the relationship is represented by the equation y = 80·22 (±1·51) + 0·836 (±0·09) z -0·006 (±0·001) z 2 , z = number of days after 19 September. This represents an increase of 0·247 cwt/acre/day of sugar in October and 0·083 cwt/acre/day in November, equivalent to about 2½ tons/acre of roots in October and 1 ton/acre in November. The effect on sugar yield of different lengths of growing period, which ranged from 138 to 271 days, is represented by the equation y = 38·7 (±26·6) + 1·045 (±0·267) a -0·0017 (±0·0007) a 2 , a = number of days between sowing and harvest. On average, sowing date had negligible effect on sugar percentage at harvest. In 3 years sugar percentage increased after the first harvest to a maximum and then decreased; in 2 years it decreased with consecutive harvests.
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 9
Claim · model-written summary
March and early April sowings gave similar sugar yields.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Sowings in March or early Aprile0
- Outcome
- yields of sugare0
- Direction
- similare0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Sowings in March or early April gave similar yields of sugar”
Claim · model-written summary
Later sowing progressively decreased sugar yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- later sowingse0
- Outcome
- yielde0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“with later sowings yield decreased progressively faster”
Claim · model-written summary
Delayed harvest increased sugar yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Delayed harveste0
- Outcome
- sugar yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“Delayed harvest increased sugar yield”
Claim · model-written summary
Sugar yield increased by 0·247 cwt/acre/day in October.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- sugare0
- Direction
- increasee0
- Value
- 0·247 cwt/acre/daye0
- Qualifier
- Octobere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“increase of 0·247 cwt/acre/day of sugar in October”
Claim · model-written summary
Sugar yield increased by 0·083 cwt/acre/day in November.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- sugare0
- Direction
- increasee0
- Value
- 0·083 cwt/acre/daye0
- Qualifier
- Novembere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“This represents an increase of 0·247 cwt/acre/day of sugar in October and 0·083 cwt/acre/day in November”
Claim · model-written summary
Growing period length was related to sugar yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- different lengths of growing periode0
- Outcome
- sugar yielde0
- Value
- 138 to 271 dayse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“effect on sugar yield of different lengths of growing period, which ranged from 138 to 271 days”
Claim · model-written summary
Sowing date had negligible effect on sugar percentage at harvest.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- sowing datee0
- Outcome
- sugar percentage at harveste0
- Direction
- negligible effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“sowing date had negligible effect on sugar percentage at harvest”
Claim · model-written summary
In three years sugar percentage increased after first harvest and then decreased.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- sugar percentagee0
- Direction
- increasede0
- Qualifier
- In 3 yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“In 3 years sugar percentage increased after the first harvest to a maximum and then decreased”
Claim · model-written summary
In two years sugar percentage decreased with consecutive harvests.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- sugart0
- Direction
- decreasede0
- Qualifier
- in 2 yearse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“sugar beet”
e0“in 2 years it decreased with consecutive harvests”
The same questions in other papers
sowing time · yield · Beta vulgaris (beet)Positive and negative results
5 papers in the same direction as this paper · 20 in the opposite direction
- positive
- positive
- positive
22 papers more in this group
See all 26 papers →stage · quality: sugar starch · Beta vulgaris (beet)Results agree
1 paper in the same direction as this paper
- positive
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.