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paper W2095013219 ✕

Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

The yield decrease after soil mixing is attributed to lowered availability of soil phosphorus.

Taxon
subterranean cloverTrifolium subterraneume1
Compound
soil phosphoruse2
Outcome
yield of subterranean clovere1
Qualifier
lowered availabilitye2

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e2

“This was shown to be due to lowered availability of the soil phosphorus and was probably brought about by sorption of the available phosphorus, which had accumulated at the soil surface, by the unsaturated subsurface soil”

✓ located verbatim in the source · abstract, characters 171–392

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Uniform mixing of the surface 4 in. of pasture soils decreased subterranean clover yield compared with undisturbed soil.

Taxon
subterranean cloverTrifolium subterraneume1
Treatment
uniform mixing of the surface 4 in. of pasture soilse1
Outcome
yield of subterranean clovere1
Direction
decreasee1
Comparator
undisturbed soile1
Setting
pot culturee1

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Waterlogging increased the phosphate sorption capacity of the soil.

Taxon
subterranean cloverTrifolium subterraneume1
Treatment
waterlogging treatmente6
Outcome
phosphate sorption capacitye6
Direction
increasede6

Not reportedComparator

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e6

“The phosphate sorption capacity of the soil was increased by the waterlogging treatment but decreased to its original value when the soil was air-dried”

✓ located verbatim in the source · abstract, characters 747–898

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

Short periods of waterlogging (1–2 days) lowered soil phosphorus availability in subterranean clover pasture soils.

Taxon
subterranean cloverTrifolium subterraneume1
Treatment
Short periods of waterlogging (1–2 days)e3
Outcome
availability of soil phosphoruse3
Direction
lowerede3

Not reportedComparator

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e3

“Short periods of waterlogging (1–2 days) also brought about lowered availability of soil phosphorus”

✓ located verbatim in the source · abstract, characters 394–493

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Mechanismauthor interpretationoriginal resultmeasured

Claim · model-written summary

Phosphate was converted to non-available forms during short anaerobic conditions, which appeared to cause the lowered phosphorus availability.

Taxon
subterranean cloverTrifolium subterraneume1
Compound
phosphatee5
Outcome
non-available formse5
Qualifier
anaerobic conditionse5

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e5

“The effect appeared to be due to the conversion of phosphate to non-available forms during the short period of anaerobic conditions”

✓ located verbatim in the source · abstract, characters 614–745

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Intervention effectobservedoriginal resultmeasured

Claim · model-written summary

Air-drying returned the waterlogging-increased phosphate sorption capacity to its original value.

Taxon
subterranean cloverTrifolium subterraneume1
Treatment
when the soil was air-driede6
Outcome
phosphate sorption capacitye6
Direction
decreasede6
Comparator
its original valuee6

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e6

“The phosphate sorption capacity of the soil was increased by the waterlogging treatment but decreased to its original value when the soil was air-dried”

✓ located verbatim in the source · abstract, characters 747–898

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)
Intervention effectobservedoriginal resultnegativemeasured

Claim · model-written summary

The lowering of soil phosphorus availability by waterlogging was much more severe in mixed soil than in undisturbed soil cores.

Taxon
subterranean cloverTrifolium subterraneume1
Treatment
Short periods of waterlogginge3
Outcome
availability of soil phosphoruse3
Direction
much more severee4
Comparator
undisturbed soil corese4

Verbatim

e1

“Compared with growth on undisturbed soil, uniform mixing of the surface 4 in. of pasture soils caused a decrease in the yield of subterranean clover grown in pot culture”

✓ located verbatim in the source · abstract, characters 0–169
e3

“Short periods of waterlogging (1–2 days) also brought about lowered availability of soil phosphorus”

✓ located verbatim in the source · abstract, characters 394–493
e4

“This occurred both with undisturbed soil cores and with mixed soils, but was much more severe when the soil was mixed”

✓ located verbatim in the source · abstract, characters 495–612

Title

Some effects of cultivation and waterlogging on the availability of phosphorus in pasture soils

CH Williams; JR Simpson Australian Journal of Agricultural Research 1965. doi:10.1071/ar9650413

Other claims from this paper (6)

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