Abstract
An pot experiment was conducted in order to investigate effects of slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum). The experiment was three factorial ; namely the soils used were a Red soil (pH4.8) and a Dark Red soil (pH5.7). The slag was applied at a rate of 0 and 30g par 3kg (per pot) of soil, and ammonium sulfate as a source of nitrogen was applied at a rate of 2.5 and 5.0g per 3kg of soil. The weight of the aerial portions of the plant was determined as a measure of the plant growth. Significant difference in the fresh and dry weights of the plant was found between the two soils; namely the plant growth was much better on the Dark Red soil which had chemical properties superior to the Red soil in every aspect except for nitrogen content. There was also a significant interaction of the soil and slag factors indicating that the slag application was effective on the plant growth in the Red soil but not in the Dark Red soil. The increment of nitrogen applied tended to increase in the dry weight of the plant grown on the Dark Red soil though statistical significance was not found on the nitrogen factor. The level of nitrogen in the plant was significantly higher on the Red soil than on the Dark Red soil. It was deemed that this was due to the higher nitrogen content of the Red soil. The level of phosphate in the plant was found not affected by any of the soil and treatment factors. The quantity of nitrogen absorbed by the plant related closely to the extent of the plant growth and tended to be more in the Dark Red soil than in the Red soil. On the Red soil the nitrogen absorption of the plant increased with the slag application which improved the plant growth. Because of the better plant growth on the Dark Red soil, the quantity of phosphate absorbed by the plant also tended to be more on the Dark Red soil than on the Red soil.
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Claims 11
Claim · model-written summary
Sorghum plant growth (fresh and dry weight) was significantly better on Dark Red soil than on the two-soil comparison soil, Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- Dark Red soile2
- Outcome
- fresh and dry weights of the plante2
- Direction
- bettere2
- Comparator
- the two soilse2
- Setting
- Okinawan acid soilse1
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e2“Significant difference in the fresh and dry weights of the plant was found between the two soils; namely the plant growth was much better on the Dark Red soil”
Claim · model-written summary
Slag application was effective on sorghum growth in Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- slag applicatione3
- Outcome
- plant growthe3
- Direction
- increaseinferrede3
- Setting
- Red soile3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e3“There was also a significant interaction of the soil and slag factors indicating that the slag application was effective on the plant growth in the Red soil but not in the Dark Red soil”
Claim · model-written summary
Slag application was not effective on sorghum growth in Dark Red soil.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e3“There was also a significant interaction of the soil and slag factors indicating that the slag application was effective on the plant growth in the Red soil but not in the Dark Red soil”
Claim · model-written summary
Increasing the nitrogen applied tended to increase sorghum dry weight on Dark Red soil, without a significant nitrogen factor.
- Material
- Culti. Diasorghume1
- Treatment
- increment of nitrogen appliede4
- Outcome
- dry weight of the plante4
- Direction
- increasee4
- Setting
- Dark Red soile4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e4“The increment of nitrogen applied tended to increase in the dry weight of the plant grown on the Dark Red soil though statistical significance was not found on the nitrogen factor”
Claim · model-written summary
Sorghum nitrogen level was significantly higher on Red soil than on Dark Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- Red soile5
- Outcome
- level of nitrogen in the plante5
- Direction
- highere5
- Comparator
- Dark Red soile5
- Setting
- Okinawan acid soilse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e5“The level of nitrogen in the plant was significantly higher on the Red soil than on the Dark Red soil”
Claim · model-written summary
Phosphate level in sorghum was not affected by the soil and treatment factors.
- Material
- Culti. Diasorghume1
- Treatment
- soil and treatment factorse6
- Outcome
- level of phosphate in the plante6
- Direction
- not affectede6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e6“The level of phosphate in the plant was found not affected by any of the soil and treatment factors”
Claim · model-written summary
Nitrogen absorbed by sorghum was closely related to the extent of plant growth.
- Material
- Culti. Diasorghume1
- Outcome
- quantity of nitrogen absorbed by the plante7
- Qualifier
- related closely to the extent of the plant growthe7
- Setting
- Okinawan acid soilse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e7“The quantity of nitrogen absorbed by the plant related closely to the extent of the plant growth and tended to be more in the Dark Red soil than in the Red soil”
Claim · model-written summary
Nitrogen absorption by sorghum tended to be higher on Dark Red soil than on Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- Dark Red soile7
- Outcome
- quantity of nitrogen absorbed by the plante7
- Direction
- moree7
- Comparator
- Red soile7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e7“The quantity of nitrogen absorbed by the plant related closely to the extent of the plant growth and tended to be more in the Dark Red soil than in the Red soil”
Claim · model-written summary
Phosphate absorbed by sorghum tended to be higher on Dark Red soil than on Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- Dark Red soile0
- Outcome
- quantity of phosphate absorbed by the plante0
- Direction
- moree0
- Comparator
- Red soile0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e0“Because of the better plant growth on the Dark Red soil, the quantity of phosphate absorbed by the plant also tended to be more on the Dark Red soil than on the Red soil”
Claim · model-written summary
Slag application increased nitrogen absorption by sorghum on Red soil.
- Material
- Culti. Diasorghume1
- Treatment
- slag applicatione0
- Outcome
- nitrogen absorption of the plante0
- Direction
- increasede0
- Setting
- Red soile0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e0“On the Red soil the nitrogen absorption of the plant increased with the slag application which improved the plant growth”
Claim · model-written summary
The authors attribute the higher nitrogen level in sorghum on Red soil to the higher nitrogen content of Red soil.
- Material
- Culti. Diasorghume1
- Outcome
- level of nitrogen in the plante5
- Qualifier
- higher nitrogen content of the Red soile6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“slag (a soil amendment) and nitrogen applied to two Okinawan acid soils on the growth and the absorption of nitrogen and phosphate of the sorghum plant (Sorghum Sudanese x Sorghum succharatum; Culti. Diasorghum)”
e5“The level of nitrogen in the plant was significantly higher on the Red soil than on the Dark Red soil”
e6“It was deemed that this was due to the higher nitrogen content of the Red soil”
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See all 6 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.