Abstract
1. Twenty-eight experiments on sugar beet in 1956–8 compared ammonium sulphate, calcium nitrate and urea applied to the seedbed before sowing. The three fertilizers were compared at rates which supplied nil, 0·6 and 1·2 cwt. N/acre. Treatments in which 0·6 cwt. N/acre was held back until the end of June were also included. 2. Average responses in sugar yield were low, 0·6 cwt. N/acre provided virtually all the nitrogen required for maximum sugar production. The heavier nitrogen dressing, on the other hand, substantially increased the yield of tops. 3. Calcium nitrate and urea were as effective as ammonium sulphate at raising sugar yield. There was no damage to germination with any fertilizer, and when urea containing 4·5% biuret was used for topdressing in 1956, no damage was seen. Calcium nitrate and, to a lesser extent, urea produced more tops than ammonium sulphate. 4. Putting all the nitrogen into the seedbed was as effective as a split dressing in raising sugar yield. Leaching of nitrogen in a wet summer is therefore not important to sugar beet. Late nitrogen, on the other hand, never harmed sugar production if some had been given to the seedbed.
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Claims 12
Claim · model-written summary
Sugar-yield responses averaged low.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Outcome
- responses in sugar yielde0
- Direction
- lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Average responses in sugar yield were low”
t0“sugar beet”
Claim · model-written summary
0·6 cwt. N/acre supplied virtually all nitrogen for maximum sugar production.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- maximum sugar productione0
- Value
- 0·6 cwt. N/acree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“0·6 cwt. N/acre provided virtually all the nitrogen required for maximum sugar production”
t0“sugar beet”
Claim · model-written summary
The heavier nitrogen dressing substantially increased top yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- heavier nitrogen dressinge0
- Outcome
- yield of topse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The heavier nitrogen dressing, on the other hand, substantially increased the yield of tops”
t0“sugar beet”
Claim · model-written summary
Calcium nitrate matched ammonium sulphate for sugar-yield increase.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Calcium nitratee0
- Outcome
- sugar yielde0
- Direction
- as effective ase0
- Comparator
- ammonium sulphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium nitrate and urea were as effective as ammonium sulphate at raising sugar yield”
t0“sugar beet”
Claim · model-written summary
Urea matched ammonium sulphate for sugar-yield increase.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- ureae0
- Outcome
- sugar yielde0
- Direction
- as effective ase0
- Comparator
- ammonium sulphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium nitrate and urea were as effective as ammonium sulphate at raising sugar yield”
t0“sugar beet”
Claim · model-written summary
No fertilizer damaged germination.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- no damage to germinatione0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no damage to germination with any fertilizer”
t0“sugar beet”
Claim · model-written summary
Topdressing with urea containing 4·5% biuret showed no damage.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- urea containing 4·5% biurete0
- Outcome
- no damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when urea containing 4·5% biuret was used for topdressing in 1956, no damage was seen”
t0“sugar beet”
Claim · model-written summary
Calcium nitrate produced more tops than ammonium sulphate.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Calcium nitratee0
- Outcome
- topse0
- Direction
- moree0
- Comparator
- ammonium sulphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium nitrate and, to a lesser extent, urea produced more tops than ammonium sulphate”
t0“sugar beet”
Claim · model-written summary
Urea produced more tops than ammonium sulphate, to a lesser extent than calcium nitrate.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- ureae0
- Outcome
- topse0
- Direction
- moree0
- Comparator
- ammonium sulphatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Calcium nitrate and, to a lesser extent, urea produced more tops than ammonium sulphate”
t0“sugar beet”
Claim · model-written summary
All seedbed nitrogen matched a split dressing for sugar yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Putting all the nitrogen into the seedbede0
- Outcome
- sugar yielde0
- Direction
- as effective ase0
- Comparator
- a split dressinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Putting all the nitrogen into the seedbed was as effective as a split dressing in raising sugar yield”
t0“sugar beet”
Claim · model-written summary
Wet-summer nitrogen leaching was judged unimportant for sugar beet.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- Leaching of nitrogene0
- Qualifier
- in a wet summere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaching of nitrogen in a wet summer is therefore not important to sugar beet”
Claim · model-written summary
Late nitrogen never harmed sugar production when some nitrogen was supplied in the seedbed.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- sugar productione0
- Direction
- never harmede0
- Qualifier
- if some had been given to the seedbede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Late nitrogen, on the other hand, never harmed sugar production if some had been given to the seedbed”
t0“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
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See all 103 papers →nitrogen · yield · Beta vulgaris (beet)Positive and negative results
141 papers in the same direction as this paper · 16 in the opposite direction · 3 reporting no difference from an alternative
- no effect
- positive
- negative
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.