Abstract
Plant growth, nature of nodulation, and serological identification of cultures isolated from nodules have been used to determine the success achieved with inocula of clover rhizobia. The Lismore krasnozems offer difficulties in the way of successful seed inoculation. Milk and phosphate supplements with the inoculum do not obviate the difficulty, but heavier rates of inoculation give a reasonable degree of nodulation even with untreated soils. The unfavourable nature of these soils is reflected in their relatively low rhizobial population and the failure of added cells to persist or multiply at a rate comparable with other soils and conditions. Raising pH to c. 7 by the addition of Ca(OH)2 or CaCO3 markedly improves the soil as a medium for survival and multiplication of clover rhizobia. Even a small rise in pH gives appreciable improvement. Strains of root-nodule bacteria differ markedly in their ability to compete with each other for growth and nodule formation on a host. The relative performance of strains can be affected by such factors as the nature of the soil and the presence and nature of the host. Competition for nodulation need not be related in any simple way to competition for growth. Competition by :"native" strains can be an important factor contributing to success or failure with added inoculum.
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Claims 10
Claim · model-written summary
Milk and phosphate supplements with the inoculum did not overcome the difficulty of successful seed inoculation.
TrifoliumNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e1“The Lismore krasnozems offer difficulties in the way of successful seed inoculation”
e2“Milk and phosphate supplements with the inoculum do not obviate the difficulty”
Claim · model-written summary
Heavier rates of inoculation gave a reasonable degree of nodulation even in untreated soils.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e3“heavier rates of inoculation give a reasonable degree of nodulation even with untreated soils”
Claim · model-written summary
Clover rhizobial population was relatively low in Lismore krasnozem soils.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e1“The Lismore krasnozems offer difficulties in the way of successful seed inoculation”
e4“The unfavourable nature of these soils is reflected in their relatively low rhizobial population and the failure of added cells to persist or multiply at a rate comparable with other soils and conditions”
Claim · model-written summary
Added clover rhizobial cells did not persist or multiply at a rate comparable with other soils and conditions.
- Outcome
- added cells to persist or multiplye4
- Qualifier
- at a rate comparable with other soils and conditionse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e4“The unfavourable nature of these soils is reflected in their relatively low rhizobial population and the failure of added cells to persist or multiply at a rate comparable with other soils and conditions”
Claim · model-written summary
Raising soil pH to c. 7 with Ca(OH)2 or CaCO3 markedly improved survival and multiplication of clover rhizobia.
- Treatment
- Raising pH to c. 7 by the addition of Ca(OH)2 or CaCO3e5
- Outcome
- survival and multiplication of clover rhizobiae5
- Direction
- improvese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e5“Raising pH to c. 7 by the addition of Ca(OH)2 or CaCO3 markedly improves the soil as a medium for survival and multiplication of clover rhizobia”
Claim · model-written summary
A small rise in soil pH gave appreciable improvement for clover rhizobia.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e6“Even a small rise in pH gives appreciable improvement”
Claim · model-written summary
Strains of root-nodule bacteria differ markedly in their ability to compete for growth and nodule formation on a host.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e7“Strains of root-nodule bacteria differ markedly in their ability to compete with each other for growth and nodule formation on a host”
Claim · model-written summary
The relative performance of strains can be affected by soil and host factors.
- Treatment
- the nature of the soil and the presence and nature of the hoste1
- Outcome
- relative performance of strainse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e1“The relative performance of strains can be affected by such factors as the nature of the soil and the presence and nature of the host”
Claim · model-written summary
Competition for nodulation need not be related to competition for growth.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e1“Competition for nodulation need not be related in any simple way to competition for growth”
Claim · model-written summary
Competition by native strains can be an important factor contributing to success or failure with added inoculum.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“The root-nodule bacteria as factors in clover establishment in the red basaltic soils of the Lismore district, NSW”
e1“Competition by :"native" strains can be an important factor contributing to success or failure with added inoculum”
The same questions in other papers
inoculation · symbiosis · TrifoliumResults agree
6 papers in the same direction as this paper
- positive
- positive
- positive
3 papers more in this group
See all 7 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.