Claim · model-written summary
Increased soil bulk density increased water retention capacity (matric suction ≤ 10 kPa).
- Taxon
- carrot
Daucus carotat0 - Treatment
- Increased soil bulk densitiese3
- Outcome
- water retention capacitye3
- Direction
- increasede3
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and quality of carrot”
e3“Increased soil bulk densities were reflected by increased water retention capacity (matric suction ≤ 10 kPa) and greater penetrometer resistance”
Title
Effect of soil compactness on the growth and quality of carrot
Liisa Pietola Agricultural and Food Science 1995. doi:10.23986/afsci.72611
Other claims from this paper (19)
- Intervention effect Dry bulk density of the plough layer increased by 8% in fine sand with increasing tractor passes.
- Intervention effect Dry bulk density of the plough layer increased by 10% in mull soil with increasing tractor passes.
- Intervention effect Dry bulk density of the plough layer increased by 13% in clay soil with increasing tractor passes.
- Intervention effect Greater bulk densities in mull soil decreased soil O2 content to 10% when the subsoil was wet.
- Observation Optimum soil compactness for carrot yield was observed only in the clay field, at D = 82.
- Observation Compacted clay soil gave carrot tap root carotene content of 10 mg/100 g, which reached an acceptable level.
- Observation Compacted clay soil gave carrot tap root sugar content of 5%, which reached an acceptable level.
- Observation The lowest carotene content of carrot, 4 mg/100 g, was found in loose mull soil after a cool late summer in 1990.
- Observation The maximum fibrous root dry weight of carrot was 60 μg per soil volume, in compacted or irrigated soil to 30 cm depth.
- Observation The maximum fibrous root length of carrot was 1.2 cm per soil volume, in compacted or irrigated soil to 30 cm depth.
- Observation The maximum fibrous root surface area of carrot was 0.05 cm2 per soil volume, in compacted or irrigated soil to 30 cm depth.
- Intervention effect Rotary harrowing to 20 cm gave the lowest dry soil bulk density in the plough layer.
- Association Increased soil bulk density gave greater soil penetrometer resistance.
- Association Excessive penetrometer resistance limited carrot tap root growth in compacted fine sand without irrigation during biomass accumulation.
- Intervention effect Soil compaction promoted carrot crop establishment and early growth compared with loose soil beds.
- Intervention effect Water applications promoted carrot shoot growth.
- Intervention effect Water applications did not affect final carrot shoot and tap root yield.
- Intervention effect Soil compaction had adverse effects on carrot external quality, with short, deformed and conical tap roots of greater maximum diameter.
- Mechanism The surface area of the carrot fibrous root system is a beneficial factor for maintaining high carotene and sugar contents in tap roots after partial soil compaction.