Abstract
1. It was attempted for the control of weeds that dusting of CaCN3 at the rate of 5.63k.g. per are all over the paddy field well prepared were made 5 days before the rice trans-planting into it. This proved to be effbctive for this porpos, the quantity of weed beeing reduced to one quarter of that of unweeded plot. More than 10% of the rice yield of that plot, nevertheless, was decreased as compared with that of the oridinary managed plot, the reason of which may be due to the unrationality of the apilication of CaCN3 as the manure. 2. Application of CaON3 at the rate of 2.81∼5.63 k.g. per are between rows of rice plants in the middle of late ef July was effective for the control of weed. The rice plants were, however injured at the same time, and the yield was consequently decreased about 20% as compared with the contro1, so this method is not practicable. Here, it may bc noted that the rice yield are sometimes increased by the application of CaCN3 at the rate of 1.88k.g. per are with a caution not to fall on the leaves of rice. 3. Weeds of rice field were also killed by the 2% solution of H2SO4 or 20% solution of FeSO4 7H2O, but the rice yield were decreased 5∼lO% by these spraying.
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Claims 11
Claim · model-written summary
Dusting CaCN3 at 5.63 kg per are five days before rice transplanting reduced weed quantity to one quarter of an unweeded plot in a paddy field.
- Taxon
- rice
Oryza sativae1 - Treatment
- dusting of CaCN3 at the rate of 5.63k.g. per aree1
- Interactor
- weede1weed
- Outcome
- quantity of weede1
- Direction
- reducede1
- Value
- one quartere1
- Comparator
- unweeded plote1
- Setting
- paddy fielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“dusting of CaCN3 at the rate of 5.63k.g. per are all over the paddy field well prepared were made 5 days before the rice trans-planting into it. This proved to be effbctive for this porpos, the quantity of weed beeing reduced to one quarter of that of unweeded plot”
Claim · model-written summary
The 5.63 kg per are CaCN3 dusting decreased rice yield by more than 10% compared with the ordinary managed plot.
- Taxon
- riceOryza sativae2
- Treatment
- dusting of CaCN3 at the rate of 5.63k.g. per aree1
- Outcome
- rice yielde2
- Direction
- decreasede2
- Value
- More than 10%e2
- Comparator
- managed plote2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“dusting of CaCN3 at the rate of 5.63k.g. per are all over the paddy field well prepared were made 5 days before the rice trans-planting into it. This proved to be effbctive for this porpos, the quantity of weed beeing reduced to one quarter of that of unweeded plot”
e2“More than 10% of the rice yield of that plot, nevertheless, was decreased as compared with that of the oridinary managed plot”
Claim · model-written summary
Applying CaON3 at 2.81 to 5.63 kg per are between rice rows in late July was effective for weed control.
- Taxon
- riceOryza sativae3
- Treatment
- CaON3 at the rate of 2.81∼5.63 k.g. per aree3
- Interactor
- weede3weed
- Outcome
- control of weede3
- Qualifier
- between rows of rice plants in the middle of late ef Julye3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Application of CaON3 at the rate of 2.81∼5.63 k.g. per are between rows of rice plants in the middle of late ef July was effective for the control of weed”
Claim · model-written summary
The 2.81 to 5.63 kg per are CaON3 application decreased rice yield by about 20% compared with the control.
- Taxon
- riceOryza sativae4
- Treatment
- CaON3 at the rate of 2.81∼5.63 k.g. per aree3
- Outcome
- yielde4
- Direction
- decreasede4
- Value
- about 20%e4
- Comparator
- contro1e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Application of CaON3 at the rate of 2.81∼5.63 k.g. per are between rows of rice plants in the middle of late ef July was effective for the control of weed”
e4“The rice plants were, however injured at the same time, and the yield was consequently decreased about 20% as compared with the contro1, so this method is not practicable”
Claim · model-written summary
The authors conclude that this CaON3 method is not practicable for rice.
- Taxon
- riceOryza sativae4
- Outcome
- this method is not practicablee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“The rice plants were, however injured at the same time, and the yield was consequently decreased about 20% as compared with the contro1, so this method is not practicable”
Claim · model-written summary
The 2.81 to 5.63 kg per are CaON3 application injured the rice plants.
- Taxon
- riceOryza sativae4
- Treatment
- CaON3 at the rate of 2.81∼5.63 k.g. per aree3
- Outcome
- injurede4
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Application of CaON3 at the rate of 2.81∼5.63 k.g. per are between rows of rice plants in the middle of late ef July was effective for the control of weed”
e4“The rice plants were, however injured at the same time, and the yield was consequently decreased about 20% as compared with the contro1, so this method is not practicable”
Claim · model-written summary
The 1.88 kg per are CaCN3 application sometimes increased rice yield when kept off the leaves.
- Taxon
- riceOryza sativae5
- Treatment
- CaCN3 at the rate of 1.88k.g. per aree5
- Outcome
- rice yielde5
- Direction
- increasede5
- Qualifier
- sometimese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“Here, it may bc noted that the rice yield are sometimes increased by the application of CaCN3 at the rate of 1.88k.g. per are with a caution not to fall on the leaves of rice”
Claim · model-written summary
The 2% H2SO4 spray killed weeds in the rice field.
- Taxon
- riceOryza sativae6
- Treatment
- 2% solution of H2SO4e6
- Interactor
- Weedse6weed
- Outcome
- killede6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Weeds of rice field were also killed by the 2% solution of H2SO4 or 20% solution of FeSO4 7H2O”
Claim · model-written summary
The 20% FeSO4 7H2O spray killed weeds in the rice field.
- Taxon
- riceOryza sativae6
- Treatment
- 20% solution of FeSO4 7H2Oe6
- Interactor
- Weedse6weed
- Outcome
- killede6
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Weeds of rice field were also killed by the 2% solution of H2SO4 or 20% solution of FeSO4 7H2O”
Claim · model-written summary
The 2% H2SO4 spray decreased rice yield by 5 to 10%.
- Taxon
- riceOryza sativae7
- Treatment
- 2% solution of H2SO4e6
- Outcome
- rice yielde7
- Direction
- decreasede7
- Value
- 5∼lO%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Weeds of rice field were also killed by the 2% solution of H2SO4 or 20% solution of FeSO4 7H2O”
e7“but the rice yield were decreased 5∼lO% by these spraying”
Claim · model-written summary
The 20% FeSO4 7H2O spray decreased rice yield by 5 to 10%.
- Taxon
- riceOryza sativae7
- Treatment
- 20% solution of FeSO4 7H2Oe6
- Outcome
- rice yielde7
- Direction
- decreasede7
- Value
- 5∼lO%e7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Weeds of rice field were also killed by the 2% solution of H2SO4 or 20% solution of FeSO4 7H2O”
e7“but the rice yield were decreased 5∼lO% by these spraying”
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