Abstract
Summary Three experiments (1970–2) on calcareous sandy loan tested all combinations of four plant densities (18500–124000 plants/ha), two amounts of potassium (0, 156 kg/K/ha) and sodium (0, 247 kg/Na/ha) fertilizer and two watering treatments on yield and chemical composition of sugar beet. The main effects of the treatments in all three experiments confirmed that at least 75000 plants/ha were needed for maximum sugar yield, that sodium fertilizer increased sugar yield more than potassium (+0.76 and +0.29 t/ha respectively) and that the crop responded to irrigation in some years (+1.35 t sugar/ha in 1970 and +1.67 t/ha in 1972). Analysis of the growth of the crop showed that increasing the plant density increased leaf growth per unit area from singling onwards and giving irrigation increased it from July; the effects persisted until harvest and were reflected in increased sugar yields. Fertilizer increased leaf growth early in the season but the effect disappeared later, although sugar yield was still increased. Interactions between plant density, fertilizer treatment and irrigation were small every year but there were some consistent effects on sugar yield. The results suggest that in commercial practice the optimum density is 75000 plants/ha; where irrigation is not practised, 247 kg/ha of sodium and 70 kg/ha of potassium fertilizer should be given. Where irrigation is applied, only 247 kg/ha of sodium needs to be given as the extra water increases the uptake of soil potassium.
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Claims 13
Claim · model-written summary
At least 75000 plants/ha were needed for maximum sugar yield.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarist0 - Outcome
- sugar yielde0
- Direction
- maximume0
- Value
- 75000 plants/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“at least 75000 plants/ha were needed for maximum sugar yield”
t0“sugar beet”
Claim · model-written summary
Sodium fertilizer increased sugar yield by 0.76 t/ha.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- sodium fertilizere0
- Outcome
- sugar yielde0
- Direction
- increasede0
- Value
- +0.76e0
- Comparator
- potassiume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sodium fertilizer increased sugar yield more than potassium (+0.76 and +0.29 t/ha respectively)”
t0“sugar beet”
Claim · model-written summary
Potassium fertilizer increased sugar yield by 0.29 t/ha.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- potassiume0
- Outcome
- sugar yielde0
- Direction
- increasede0
- Value
- +0.29 t/hae0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sodium fertilizer increased sugar yield more than potassium (+0.76 and +0.29 t/ha respectively)”
t0“sugar beet”
Claim · model-written summary
Irrigation increased sugar yield by 1.35 t/ha in 1970.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- sugare0
- Direction
- respondede0
- Value
- +1.35 t sugar/hae0
- Qualifier
- 1970e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the crop responded to irrigation in some years (+1.35 t sugar/ha in 1970 and +1.67 t/ha in 1972).”
t0“sugar beet”
Claim · model-written summary
Irrigation increased sugar yield by 1.67 t/ha in 1972.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- sugare0
- Direction
- respondede0
- Value
- +1.67 t/hae0
- Qualifier
- 1972e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the crop responded to irrigation in some years (+1.35 t sugar/ha in 1970 and +1.67 t/ha in 1972).”
t0“sugar beet”
Claim · model-written summary
Higher density increased leaf growth per area from singling to harvest.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Organ / stage
- leafe0
- Treatment
- increasing the plant densitye0
- Outcome
- leaf growth per unit areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increasing the plant density increased leaf growth per unit area from singling onwards”
t0“sugar beet”
Claim · model-written summary
Irrigation increased leaf growth from July to harvest.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- irrigatione0
- Outcome
- leaf growth per unit areae1
- Direction
- increasede0
- Qualifier
- from July; the effects persisted until harveste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“giving irrigation increased it from July; the effects persisted until harvest”
t0“sugar beet”
e1“increased leaf growth per unit area from singling onwards”
Claim · model-written summary
Fertilizer increased early leaf growth but the effect disappeared later.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Fertilizere0
- Outcome
- leaf growthe0
- Direction
- increasede0
- Qualifier
- effect disappeared latere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer increased leaf growth early in the season but the effect disappeared later, although sugar yield was still increased.”
t0“sugar beet”
Claim · model-written summary
Fertilizer increased sugar yield despite the transient leaf-growth response.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Treatment
- Fertilizere0
- Outcome
- sugar yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilizer increased leaf growth early in the season but the effect disappeared later, although sugar yield was still increased.”
t0“sugar beet”
Claim · model-written summary
Interactions among density, fertilizer and irrigation were small but consistent for yield.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- effects on sugar yielde0
- Qualifier
- small every yeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Interactions between plant density, fertilizer treatment and irrigation were small every year but there were some consistent effects on sugar yield.”
t0“sugar beet”
Claim · model-written summary
Commercial sugar beet density should be 75000 plants/ha.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- optimum density is 75000 plants/hae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in commercial practice the optimum density is 75000 plants/ha”
t0“sugar beet”
Claim · model-written summary
Without irrigation, apply sodium and potassium fertilizers at the recommended rates.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- 247 kg/ha of sodium and 70 kg/ha of potassium fertilizer should be givene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“where irrigation is not practised, 247 kg/ha of sodium and 70 kg/ha of potassium fertilizer should be given.”
t0“sugar beet”
Claim · model-written summary
With irrigation, only sodium fertilizer is recommended.
- Taxon
- sugar beetBeta vulgaris subsp. vulgarist0
- Outcome
- only 247 kg/ha of sodium needs to be givene0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Where irrigation is applied, only 247 kg/ha of sodium needs to be given as the extra water increases the uptake of soil potassium.”
t0“sugar beet”
The same questions in other papers
sodium atom · quality: sugar starch · Beta vulgaris (beet)Results agree
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fertilization · quality: sugar starch · Beta vulgaris (beet)Results differ
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See all 20 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.