Abstract
Abstract Rates of ground dolomitic and calcitic limestone ranging from 0 through 16 tons per acre were applied to Tatum silt loam at the time of seeding alfalfa in the spring of 1956. Lime has proved to be indispensable to yield and longevity. Total yields for three cutting years ranged from 0.25 to 8.0 tons per acre and stand survival at the end of the third cutting year varied from 0 to 95%. A true “critical level” of calcium or magnesium in neither soil nor plant was found. Rather, increases in the rate of lime applied were accompanied by gradual increases in soil pH, exchangeable bases, and percentage base saturation. In contrast, the application of relatively small amounts of lime reduced the exchangeable aluminum content of the soil sharply, and these reductions were closely correlated with increased alfalfa yields. Yields were in better agreement with base‐exchange saturation calculated from exchangeable metal cations than that calculated from metal cations plus exchangeable hydrogen. A slight and consistent increase in yield from dolomitic stone over calcitic stone was not significant. Depth of root penetration appeared not to be a factor contributing to the benefits from liming. Decrease in exchangeable aluminum in the soil and improved nitrogen metabolism are postulated as the chief favorable factors under the conditions of this experiment.
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Claims 11
Claim · model-written summary
Lime was indispensable to alfalfa yield and longevity.
- Taxon
- Alfalfa
Medicago sativat0 - Treatment
- Limee1
- Outcome
- yield and longevitye1
- Qualifier
- indispensablee1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e1“Lime has proved to be indispensable to yield and longevity”
Claim · model-written summary
Total alfalfa yields over three cutting years ranged from 0.25 to 8.0 tons per acre.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- Total yieldse2
- Value
- 0.25 to 8.0 tons per acree2
- Qualifier
- three cutting yearse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e2“Total yields for three cutting years ranged from 0.25 to 8.0 tons per acre”
Claim · model-written summary
Alfalfa stand survival at the end of the third cutting year varied from 0 to 95%.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- stand survivale3
- Value
- 0 to 95%e3
- Qualifier
- at the end of the third cutting yeare3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e3“stand survival at the end of the third cutting year varied from 0 to 95%”
Claim · model-written summary
No true critical level of calcium or magnesium was found in soil or plant for alfalfa.
- Taxon
- AlfalfaMedicago sativat0
- Outcome
- critical levele4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e4“A true “critical level” of calcium or magnesium in neither soil nor plant was found”
Claim · model-written summary
Increasing lime rate gradually increased soil pH, exchangeable bases and percentage base saturation.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- rate of lime appliede5
- Outcome
- soil pH, exchangeable bases, and percentage base saturatione5
- Direction
- gradual increasese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e5“increases in the rate of lime applied were accompanied by gradual increases in soil pH, exchangeable bases, and percentage base saturation”
Claim · model-written summary
Small amounts of lime sharply reduced exchangeable aluminum content of the soil.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- the application of relatively small amounts of limee6
- Outcome
- exchangeable aluminum content of the soile6
- Direction
- reducede6
- Qualifier
- sharplye6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e6“the application of relatively small amounts of lime reduced the exchangeable aluminum content of the soil sharply, and these reductions were closely correlated with increased alfalfa yields”
Claim · model-written summary
Reductions in exchangeable aluminum were closely correlated with increased alfalfa yields.
- Taxon
- AlfalfaMedicago sativat0
- Compound
- exchangeable aluminume6
- Outcome
- alfalfa yieldse6
- Direction
- increasede6
- Qualifier
- closely correlatede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e6“the application of relatively small amounts of lime reduced the exchangeable aluminum content of the soil sharply, and these reductions were closely correlated with increased alfalfa yields”
Claim · model-written summary
Yields agreed better with base-exchange saturation calculated from exchangeable metal cations than with saturation including exchangeable hydrogen.
- Taxon
- AlfalfaMedicago sativat0
- Compound
- base‐exchange saturatione7
- Outcome
- Yieldse7
- Direction
- better agreemente7
- Comparator
- metal cations plus exchangeable hydrogene7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e7“Yields were in better agreement with base‐exchange saturation calculated from exchangeable metal cations than that calculated from metal cations plus exchangeable hydrogen”
Claim · model-written summary
Dolomitic stone gave a slight and consistent yield increase over calcitic stone, not significant.
- Taxon
- AlfalfaMedicago sativat0
- Treatment
- dolomitic stonee7
- Outcome
- yielde7
- Direction
- increasee7
- Qualifier
- slight and consistente7
- Comparator
- calcitic stonee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e7“A slight and consistent increase in yield from dolomitic stone over calcitic stone was not significant”
Claim · model-written summary
Depth of root penetration was not a factor contributing to the benefits of liming.
- Taxon
- AlfalfaMedicago sativat0
- Organ / stage
- roote7
- Outcome
- Depth of root penetratione7
- Qualifier
- not to be a factor contributing to the benefits from liminge7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e7“Depth of root penetration appeared not to be a factor contributing to the benefits from liming”
Claim · model-written summary
Decrease in exchangeable aluminum and improved nitrogen metabolism are postulated as the chief favorable factors for the benefits of liming on alfalfa.
- Taxon
- AlfalfaMedicago sativat0
- Compound
- exchangeable aluminume7
- Outcome
- benefits from liminge6
- Qualifier
- improved nitrogen metabolisme7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Alfalfa Growth”
e6“Depth of root penetration appeared not to be a factor contributing to the benefits from liming”
e7“Decrease in exchangeable aluminum in the soil and improved nitrogen metabolism are postulated as the chief favorable factors”
The same questions in other papers
lime · yield · Medicago sativa (alfalfa)Results differ
8 papers in the same direction as this paper · 41 in the opposite direction
- positive
- positive
- positive
46 papers more in this group
See all 50 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.