Abstract
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. 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. Short periods of waterlogging (1–2 days) also brought about lowered availability of soil phosphorus. This occurred both with undisturbed soil cores and with mixed soils, but was much more severe when the soil was mixed. The effect appeared to be due to the conversion of phosphate to non-available forms during the short period of anaerobic conditions. 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.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
Uniform mixing of the surface 4 in. of pasture soils decreased subterranean clover yield compared with undisturbed soil.
- Taxon
- subterranean clover
Trifolium 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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
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”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
e3“Short periods of waterlogging (1–2 days) also brought about lowered availability of soil phosphorus”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
e3“Short periods of waterlogging (1–2 days) also brought about lowered availability of soil phosphorus”
e4“This occurred both with undisturbed soil cores and with mixed soils, but was much more severe when the soil was mixed”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
e5“The effect appeared to be due to the conversion of phosphate to non-available forms during the short period of anaerobic conditions”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
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”
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
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
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”
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”