Abstract
SUMMARY Nineteen experiments were made between 1964 and 1967 on fields where previous sugar beet crops showed symptoms of magnesium deficiency. None, 2·5 or 5 cwt/acre kieserite or 20 cwt/acre dolomitic limestone were tested in a factorial design with none or 3 cwt/acre agricultural salt (crude sodium chloride), and 0.8 or 1.2 cwt/acre nitrogen as ‘Nitro-Chalk’. Additional plots tested kainit (7 cwt/acre) and a large dressing of potash (2 cwt/acre) as muriate of potash. Kieserite and dolomitic limestone increased sugar yield and the most effective dressing was 5 cwt/acre kieserite, which gave 3·1 cwt/acre more sugar than the crop without magnesium fertilizer. Agricultural salt and the larger dressing of nitrogen were profitable, and neither interacted with magnesium on average; the large dressing of potash also increased yield. The magnesium in the kainit increased yield slightly, but the dressing tested supplied too little to satisfy the crop's requirement of magnesium. Each year in late summer the percentage of plants showing magnesium-deficiency symptoms was recorded, and a sample of twenty-four plants harvested from each of the magnesium treatments and analysed. All the magnesium fertilizers increased the concentration of magnesium in leaves, petioles and roots, and also decreased the number of plants showing deficiency symptoms. The magnesium concentrations in plants grown without magnesium differed widely and were related both to the yield response to magnesium fertilizer and to the percentage of plants with deficiency symptoms. Both relationships showed a similar ‘transition zone’ from deficiency to adequate supply, for leaves this was 0·2–0·4% Mg, for petioles 0·1–0·2 Mg and for roots 0·075–0·125 % Mg in the dry matter.
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Claims 14
Claim · model-written summary
Kieserite increased sugar yield.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Treatment
- Kieseritee0
- Outcome
- sugar yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kieserite and dolomitic limestone increased sugar yield”
t0“sugar beet”
Claim · model-written summary
Dolomitic limestone increased sugar yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- dolomitic limestonee0
- Outcome
- sugar yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Kieserite and dolomitic limestone increased sugar yield”
t0“sugar beet”
Claim · model-written summary
The 5 cwt/acre kieserite dressing gave 3·1 cwt/acre more sugar than no magnesium fertilizer.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- 5 cwt/acre kieseritee0
- Outcome
- sugare0
- Direction
- moree0
- Value
- 3·1 cwt/acree0
- Comparator
- without magnesium fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the most effective dressing was 5 cwt/acre kieserite, which gave 3·1 cwt/acre more sugar than the crop without magnesium fertilizer.”
t0“sugar beet”
Claim · model-written summary
Agricultural salt was profitable in sugar beet production.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Agricultural salte0
- Outcome
- profitablee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Agricultural salt and the larger dressing of nitrogen were profitable”
t0“sugar beet”
Claim · model-written summary
The larger nitrogen dressing was profitable.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- larger dressing of nitrogene0
- Outcome
- profitablee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Agricultural salt and the larger dressing of nitrogen were profitable”
t0“sugar beet”
Claim · model-written summary
Salt and nitrogen did not interact with magnesium on average.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Agricultural salte1
- Outcome
- interacted with magnesiume0
- Direction
- neithere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither interacted with magnesium on average”
e1“Agricultural salt and the larger dressing of nitrogen were profitable”
t0“sugar beet”
Claim · model-written summary
A large potash dressing increased yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- large dressing of potashe0
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the large dressing of potash also increased yield.”
t0“sugar beet”
Claim · model-written summary
Magnesium in kainit slightly increased yield but did not satisfy crop magnesium requirements.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- kainite0
- Outcome
- yielde0
- Direction
- increasede0
- Qualifier
- supplied too little to satisfy the crop's requirement of magnesiume0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The magnesium in the kainit increased yield slightly, but the dressing tested supplied too little to satisfy the crop's requirement of magnesium.”
t0“sugar beet”
Claim · model-written summary
Magnesium fertilizers increased magnesium concentrations in sugar beet leaves, petioles and roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- magnesium fertilizerse0
- Outcome
- concentration of magnesium in leaves, petioles and rootse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“All the magnesium fertilizers increased the concentration of magnesium in leaves, petioles and roots”
t0“sugar beet”
Claim · model-written summary
Magnesium fertilizers decreased the number of plants with deficiency symptoms.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- magnesium fertilizerse1
- Outcome
- number of plants showing deficiency symptomse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“also decreased the number of plants showing deficiency symptoms.”
e1“All the magnesium fertilizers increased the concentration of magnesium in leaves, petioles and roots”
t0“sugar beet”
Claim · model-written summary
Magnesium concentrations without fertilizer were related to yield response and deficiency symptom frequency.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- without magnesiume0
- Outcome
- yield response to magnesium fertilizer and to the percentage of plants with deficiency symptomse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The magnesium concentrations in plants grown without magnesium differed widely and were related both to the yield response to magnesium fertilizer and to the percentage of plants with deficiency symptoms.”
t0“sugar beet”
Claim · model-written summary
The transition zone between deficiency and adequate supply was 0·2–0·4% Mg in leaves.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- leavese0
- Outcome
- transition zonee1
- Value
- 0·2–0·4% Mge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for leaves this was 0·2–0·4% Mg”
e1“Both relationships showed a similar ‘transition zone’ from deficiency to adequate supply”
t0“sugar beet”
Claim · model-written summary
The transition zone was 0·1–0·2 Mg in petioles.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- petiolese0
- Outcome
- transition zonee1
- Value
- 0·1–0·2 Mge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for petioles 0·1–0·2 Mg”
e1“Both relationships showed a similar ‘transition zone’ from deficiency to adequate supply”
t0“sugar beet”
Claim · model-written summary
The transition zone was 0·075–0·125 % Mg in roots.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- rootse0
- Outcome
- transition zonee1
- Value
- 0·075–0·125 % Mge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“for roots 0·075–0·125 % Mg in the dry matter.”
e1“Both relationships showed a similar ‘transition zone’ from deficiency to adequate supply”
t0“sugar beet”
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