Claim · model-written summary
Most crop variables had intermediate variation at harvest.
- Taxon
- rice
Oryza sativat0 - Outcome
- most crop variablese0
- Direction
- intermediatee0
- Value
- 12–21%e0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variation at harvest was intermediate (CV = 12–21%) for most crop variables”
t0“Rice”
Title
Spatial and Temporal Variability of Transplanted Rice at the Field Scale
Achim Dobermann; Mirasol F. Pampolino; Heinz‐Ulrich Neue Agronomy Journal 1995. doi:10.2134/agronj1995.00021962008700040018x
Other claims from this paper (13)
- Observation Rice plant height had low spatial variation at all growth stages.
- Observation Tiller number showed greater variation, particularly at tillering.
- Observation Unfertilized rice grain yield ranged from 2.41 to 5.88 t ha −1.
- Observation Fertilized rice grain yield ranged from 4.54 to 8.82 t ha −1.
- Observation Transplanting errors introduced among-hill variation.
- Association Differences in growth rates and nutrient availability were associated with between-quadrat variation.
- Intervention effect Uneven topdressed nitrogen produced local variation in crop stands.
- Method / resource Two samples of three hills sufficed for rice plant-height measurement at every growth stage.
- Method / resource Increasing sample count improved tiller estimates more than enlarging the sampling unit.
- Recommendation Rice tiller sampling between tillering and panicle initiation should use five-hill units from 12 to 19 quadrats.
- Recommendation Seven samples suffice for flowering-stage measurement.
- Recommendation Harvest estimates should use 8 to 12 quadrats with 10-hill units.
- Recommendation Use stratified random sampling with samples more than 3 m apart.