Abstract
1. The author reported the experiment on the effect of soil reaction upon the germination and growth of Digitaria ciliaris Pers.2. A strong acid mineral soil originated from tertiary strata was used for this experiment, to this soil several amounts of CaCO3 (ranging O.-1.4% of the soil) was added, so as every part to the soil indicated respectively a pH value of 5.0-8.0, and the plants were cultivated in unglazed pots contaiing soil with respective pH values above mentioned.3. The seed sprouts earlier by some extent on the soil of pH value of 5.0-5.5 than that of 6.0-8.0, and the optimum reaction for germination of seeds is probably pH 5.5.4. A soil of pH value of 5.3-7.5 was favorable for the growth of that plant having the optimum point at pH 6.0-7.0 but the soil with pH values below 5 as well as above 8 seemed decidedly unfavorable.5. Mesurements of reaction of soil before and after the cultivation showed that there is a general tendency to result in a decrease in a hydrogen-ion concentration of the soil during this experiment.
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Claims 6
Claim · model-written summary
Seeds sprouted earlier at pH 5.0-5.5 than at 6.0-8.0.
- Taxon
- Digitaria ciliaris Pers
Digitaria ciliarist0 - Treatment
- pH value of 5.0-5.5e0
- Outcome
- sproutse0
- Direction
- earliere0
- Comparator
- 6.0-8.0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed sprouts earlier by some extent on the soil of pH value of 5.0-5.5 than that of 6.0-8.0”
t0“Digitaria ciliaris Pers”
Claim · model-written summary
The probable germination optimum was pH 5.5.
- Taxon
- Digitaria ciliaris PersDigitaria ciliarist0
- Outcome
- germination of seedse0
- Direction
- optimume0
- Value
- pH 5.5e0
- Qualifier
- probablye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the optimum reaction for germination of seeds is probably pH 5.5”
t0“Digitaria ciliaris Pers”
Claim · model-written summary
Growth was favored at pH 5.3-7.5, with an optimum at pH 6.0-7.0.
- Taxon
- Digitaria ciliaris PersDigitaria ciliarist0
- Treatment
- pH value of 5.3-7.5e0
- Outcome
- growthe0
- Direction
- favorablee0
- Value
- pH 6.0-7.0e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A soil of pH value of 5.3-7.5 was favorable for the growth of that plant having the optimum point at pH 6.0-7.0”
t0“Digitaria ciliaris Pers”
Claim · model-written summary
Soil below pH 5 seemed unfavorable for growth.
- Taxon
- Digitaria ciliaris PersDigitaria ciliarist0
- Treatment
- pH values below 5e0
- Outcome
- growthe1
- Direction
- unfavorablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the soil with pH values below 5 as well as above 8 seemed decidedly unfavorable”
e1“favorable for the growth of that plant”
t0“Digitaria ciliaris Pers”
Claim · model-written summary
Soil above pH 8 seemed unfavorable for growth.
- Taxon
- Digitaria ciliaris PersDigitaria ciliarist0
- Treatment
- above 8e0
- Outcome
- growthe1
- Direction
- unfavorablee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but the soil with pH values below 5 as well as above 8 seemed decidedly unfavorable”
e1“favorable for the growth of that plant”
t0“Digitaria ciliaris Pers”
Claim · model-written summary
Soil hydrogen-ion concentration tended to decrease during cultivation.
Not reportedTaxon
Verbatim
e0“there is a general tendency to result in a decrease in a hydrogen-ion concentration of the soil during this experiment”