Abstract
Influence of soil compaction on the growth and development of flue-cured tobacco was investigated at the experimental station of the Tobacco institute Zagreb. Research was carried out in model trials, in Mitscherlich's pots. Three soil compaction levels (1.2, 1.4 and 1.6 gcm -3 ) were randomized according to the block method with four replications. The soil used in the trials was the plough Iayer of Luvisol, the soil typical of the area in which flue-cured tobacco is grown in Croatia. Tobacco was picked in six harvests, and after the sixth harvest the tobacco root yield was determined by washing it out in a sieve. The soil resistance to penetration was measured during tobacco flowering, and a statistically significant increase of soil resistance (compaction) was recorded in the soil with medium and the highest bulk density compared to that with the Iowest density, increased soil compaction considerably reduced leaf yields and root development of tobacco. Tobacco leaf and root yields were significantly increased by intensified fertilization. The highest leaf and root yields were obtained in the lowest soil compaction.
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Claims 5
Claim · model-written summary
Medium and highest soil bulk density increased penetration resistance compared with the lowest density.
- Taxon
- tobacco
Nicotiana tabacumt0 - Treatment
- medium and the highest bulk densitye0
- Outcome
- soil resistance (compaction)e0
- Direction
- increasee0
- Comparator
- Iowest densitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a statistically significant increase of soil resistance (compaction) was recorded in the soil with medium and the highest bulk density compared to that with the Iowest density”
t0“tobacco”
Claim · model-written summary
Increased compaction reduced tobacco leaf yield.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increased soil compactione0
- Outcome
- leaf yieldse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased soil compaction considerably reduced leaf yields and root development of tobacco.”
Claim · model-written summary
Increased compaction reduced tobacco root development.
- Taxon
- tobaccoNicotiana tabacume0
- Treatment
- increased soil compactione0
- Outcome
- root developmente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased soil compaction considerably reduced leaf yields and root development of tobacco.”
Claim · model-written summary
Intensified fertilization increased tobacco leaf and root yields.
- Taxon
- TobaccoNicotiana tabacume0
- Treatment
- intensified fertilizatione0
- Outcome
- leaf and root yieldse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco leaf and root yields were significantly increased by intensified fertilization.”
Claim · model-written summary
Lowest soil compaction produced the highest tobacco leaf and root yields.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- lowest soil compactione0
- Outcome
- leaf and root yieldse0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest leaf and root yields were obtained in the lowest soil compaction.”
t0“tobacco”
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