Abstract
Abstract Heavily fertilized tropical grasses responded strongly to liming on two typical soils of the Humid Tropics. Liming increased the Ca and decreased the Mn content but did not affect the phosphorus or Mg content of the grasses. Surface applications of limestone were as effective as mixing limestone with the surface soil and one application was as effective as two applications at 2‐year intervals. Exchangeable Al and Mn content of the soils was sharply increased by fertilization alone but was decreased by liming. Base content at all depths sampled was decreased by fertilization alone but was increased by surface liming followed by heavy fertilization. Yields of grasses increased markedly with pH of the upper 6 inches to about 4.8, with bases to 8.0 me. per 100 g. of soil and with decreasing exchangeable Al to 2 me. per 100 g. of soil. Heavy fertilization of grasses over a 4‐year period without liming greatly depressed yields of subsequently planted tobacco and this effect was only partly compensated by reliming prior to planting the tobacco.
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Claims 15
Claim · model-written summary
Heavily fertilized tropical grasses responded strongly to liming on two typical soils of the Humid Tropics.
- Taxon
- tropical grassese0
- Treatment
- liminge0
- Outcome
- responded stronglye0
- Setting
- two typical soils of the Humid Tropicse0
Not reportedComparatorDirection
Verbatim
e0“Heavily fertilized tropical grasses responded strongly to liming on two typical soils of the Humid Tropics”
Claim · model-written summary
Liming increased the calcium content of the grasses.
Not reportedComparator
Verbatim
e1“Liming increased the Ca and decreased the Mn content but did not affect the phosphorus or Mg content of the grasses”
Claim · model-written summary
Liming decreased the manganese content of the grasses.
Not reportedComparator
Verbatim
e1“Liming increased the Ca and decreased the Mn content but did not affect the phosphorus or Mg content of the grasses”
Claim · model-written summary
Liming did not affect the phosphorus or magnesium content of the grasses.
Not reportedComparatorDirection
Verbatim
e1“Liming increased the Ca and decreased the Mn content but did not affect the phosphorus or Mg content of the grasses”
Claim · model-written summary
Surface application of limestone was as effective as mixing limestone with the surface soil.
Verbatim
t0“Heavily Fertilized Grasses”
e2“Surface applications of limestone were as effective as mixing limestone with the surface soil”
Claim · model-written summary
One limestone application was as effective as two applications at 2‐year intervals.
Verbatim
t0“Heavily Fertilized Grasses”
e3“one application was as effective as two applications at 2‐year intervals”
Claim · model-written summary
Fertilization alone sharply increased exchangeable Al and Mn content of the soils.
- Taxon
- Grassest0
- Treatment
- fertilization alonee4
- Outcome
- Exchangeable Al and Mn contente4
- Direction
- sharply increasede4
Not reportedComparator
Verbatim
t0“Heavily Fertilized Grasses”
e4“Exchangeable Al and Mn content of the soils was sharply increased by fertilization alone but was decreased by liming”
Claim · model-written summary
Liming decreased exchangeable Al and Mn content of the soils.
Not reportedComparator
Verbatim
t0“Heavily Fertilized Grasses”
e4“Exchangeable Al and Mn content of the soils was sharply increased by fertilization alone but was decreased by liming”
Claim · model-written summary
Fertilization alone decreased base content at all depths sampled.
- Taxon
- Grassest0
- Treatment
- fertilization alonee5
- Outcome
- Base contente5
- Direction
- decreasede5
- Qualifier
- at all depths samplede5
Not reportedComparator
Verbatim
t0“Heavily Fertilized Grasses”
e5“Base content at all depths sampled was decreased by fertilization alone but was increased by surface liming followed by heavy fertilization”
Claim · model-written summary
Surface liming followed by heavy fertilization increased base content at all depths sampled.
- Taxon
- Grassest0
- Treatment
- surface liming followed by heavy fertilizatione5
- Outcome
- Base contente5
- Direction
- increasede5
- Qualifier
- at all depths samplede5
Not reportedComparator
Verbatim
t0“Heavily Fertilized Grasses”
e5“Base content at all depths sampled was decreased by fertilization alone but was increased by surface liming followed by heavy fertilization”
Claim · model-written summary
Yields of grasses increased markedly with soil pH of the upper 6 inches up to about 4.8.
Verbatim
e6“Yields of grasses increased markedly with pH of the upper 6 inches to about 4.8, with bases to 8.0 me. per 100 g. of soil and with decreasing exchangeable Al to 2 me. per 100 g. of soil”
Claim · model-written summary
Yields of grasses increased markedly with bases up to 8.0 me. per 100 g. of soil.
Verbatim
e6“Yields of grasses increased markedly with pH of the upper 6 inches to about 4.8, with bases to 8.0 me. per 100 g. of soil and with decreasing exchangeable Al to 2 me. per 100 g. of soil”
Claim · model-written summary
Yields of grasses increased markedly with decreasing exchangeable Al to 2 me. per 100 g. of soil.
Verbatim
e6“Yields of grasses increased markedly with pH of the upper 6 inches to about 4.8, with bases to 8.0 me. per 100 g. of soil and with decreasing exchangeable Al to 2 me. per 100 g. of soil”
Claim · model-written summary
Heavy fertilization of grasses over a 4-year period without liming greatly depressed yields of subsequently planted tobacco.
- Taxon
- tobacco
Nicotiana tabacume7 - Treatment
- Heavy fertilization of grasses over a 4‐year period without liminge7
- Outcome
- yields of subsequently planted tobaccoe7
- Direction
- greatly depressede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Heavy fertilization of grasses over a 4‐year period without liming greatly depressed yields of subsequently planted tobacco”
Claim · model-written summary
Reliming before planting tobacco only partly compensated the depressed tobacco yields.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- reliming prior to planting the tobaccoe0
- Outcome
- this effecte0
- Direction
- only partly compensatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this effect was only partly compensated by reliming prior to planting the tobacco”
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See all 214 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.