Claim · model-written summary
Measurement error produced larger plastochron-index error when either measured leaf was near the standard length.
- Taxon
- Soybean
Glycine maxt0 - Organ / stage
- nth or (n+1)th leavese0
- Outcome
- errors of calculated P.I.e0
- Direction
- largere0
- Comparator
- standard lengthe0
Not reportedMaterialGeneCompoundInteractorInteractor roleSecond interactorSecond interactor roleTreatmentSettingValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The errors of calculated P.I. caused by errors in measuring length are larger when either nth or (n+1)th leaves are nearer the standard length.”
t0“On the Expression of Plant Age of Soybean by Means of Plastochron Index”
Title
On the Expression of Plant Age of Soybean by Means of Plastochron Index
Kiichi HANADA; Suk Yong SON Japanese Journal of Crop Science 1974. doi:10.1626/jcs.43.8
Other claims from this paper (16)
- Observation Log leaf length in soybean was approximately linear over days after germination for most of growth.
- Observation Leaf growth regression coefficients differed among soybean leaves, sometimes significantly between successive leaves.
- Observation Among leaves 1–7, upper leaves tended to have larger growth coefficients than lower leaves.
- Observation Above leaf 7, growth coefficients tended to decline with node position.
- Association Leaf growth coefficients may depend partly on nodal location.
- Method / resource Maximum plastochron-index error for leaflets was 0.07 under a reported source of error.
- Method / resource Maximum plastochron-index error for leaflets was 0.09 under a reported source of error.
- Method / resource Maximum plastochron-index error for compound leaves was 0.03 under a reported source of error.
- Method / resource Maximum plastochron-index error for compound leaves was 0.14 under a reported source of error.
- Method / resource The estimated plastochron-index errors appeared small enough for practical use.
- Method / resource Plastochron index using 30 mm or 45 mm standards was nearly linear with days for leaflets and compound leaves.
- Method / resource Corrections for three error sources were too small to distinguish graphically.
- Method / resource Central leaflets were more suitable than whole compound leaves for estimating plastochron index.
- Recommendation A 10 mm standard length may be more suitable than 2O mm for soybean plastochron index.
- Method / resource Leaf-length measurement errors caused larger plastochron-index errors at 10 mm than at 20 mm.
- Recommendation Leaf length should be measured as accurately as possible near the standard length.