Abstract
The Influence of the Primary Loess Amelioration on the K Fixation, other Chemical Characteristics and the Yield of Parabraunerden The pH‐values, carbonate content and the Ca‐saturation of the top soil increase by adding calcareous loess to a loessial soil, whereas the H + Al‐saturation decreases. During a two years experiment no change occured on the subsoil. It seems that there is no increased decomposition of organic substance, the decrease of the C‐content corresponds with the dilution which took place. In the A p ‐horizon the calcareous loess causes a decrease of exchangeable K, whereas K‐fixation increases considerably. On a soil poorly supplied with nutrients the primary loess amelioration caused a yield decrease on account of the dilution and the additional fixation of K available for plants. On a well supplied soil a yield increase could be stated which probably can still be increases by fertilizing with additional K.
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Claims 8
Claim · model-written summary
Calcareous loess increased topsoil pH, carbonate and calcium saturation.
- Taxon
- plantsViridiplantaet0
- Treatment
- adding calcareous loesse0
- Outcome
- pH‐values, carbonate content and the Ca‐saturation of the top soile0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“The pH‐values, carbonate content and the Ca‐saturation of the top soil increase by adding calcareous loess to a loessial soil”
t0“available for plants”
Claim · model-written summary
Calcareous loess decreased topsoil H + Al saturation.
Not reportedTaxonComparator
Verbatim
e0“whereas the H + Al‐saturation decreases.”
t0“primary loess amelioration”
Claim · model-written summary
The subsoil had no change over two years.
Not reportedTaxon
Verbatim
e0“During a two years experiment no change occured on the subsoil.”
Claim · model-written summary
The C-content decrease appeared to correspond to dilution rather than increased organic matter decomposition.
Not reportedTaxon
Verbatim
e0“It seems that there is no increased decomposition of organic substance, the decrease of the C‐content corresponds with the dilution which took place.”
Claim · model-written summary
Calcareous loess decreased exchangeable K in the A p horizon.
Not reportedTaxonOrgan / stageComparator
Verbatim
e0“In the A p ‐horizon the calcareous loess causes a decrease of exchangeable K”
Claim · model-written summary
Calcareous loess considerably increased K fixation in the A p horizon.
Not reportedTaxonComparator
Verbatim
e0“whereas K‐fixation increases considerably.”
t0“primary loess amelioration”
Claim · model-written summary
Loess amelioration decreased yield on nutrient-poor soil.
- Taxon
- plantsViridiplantaee0
- Treatment
- primary loess amelioratione0
- Outcome
- yielde0
- Direction
- decreasee0
- Qualifier
- soil poorly supplied with nutrientse0
Not reportedComparator
Verbatim
e0“On a soil poorly supplied with nutrients the primary loess amelioration caused a yield decrease on account of the dilution and the additional fixation of K available for plants.”
Claim · model-written summary
Loess amelioration increased yield on well supplied soil.
Not reportedTaxonComparator
Verbatim
e0“On a well supplied soil a yield increase could be stated which probably can still be increases by fertilizing with additional K.”
t0“primary loess amelioration”