Claim · model-written summary
Soil compaction had adverse effects on carrot external quality, with short, deformed and conical tap roots of greater maximum diameter.
- Taxon
- carrot
Daucus carotat0 - Treatment
- soil compactione1
- Outcome
- carrot external qualitye1
- Direction
- adversee1
- Qualifier
- short, deformed and conical tap roots with greater maximum diameterse1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“growth and quality of carrot”
e1“the adverse effects of soil compaction on carrot external quality (short, deformed and conical tap roots with greater maximum diameters) are clear”
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 increased water retention capacity (matric suction ≤ 10 kPa).
- 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.
- 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.