Abstract
Abstract Soil variability introduces an extra source of variation in field experiments and inflates the experimental error. Uniformity field trial data on rice yield were used for mapping crop productivity and studying variability in yields. Various statistical procedures such as field plot and frequency analysis, semivariogram analysis and trend analysis were used to study the nature and magnitude of variability in the data and effect of plot size on variability. Results showed that there was a considerable variation in yield data from different plot sizes. Spatial patterns in yields from all plot sizes were observed. Semivariogram analysis of residuals showed that plot sizes of 1 × 4, 3 × 4, 3 × 5, and 4 × 5 m2 had random variability and can be used in field experiments to minimize the effect of spatial variability on true treatment effects.
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Claims 3
Claim · model-written summary
Rice yield varied considerably among plot sizes.
- Taxon
- rice
Oryza sativat0 - Outcome
- considerable variation in yield datae0
- Comparator
- different plot sizese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“there was a considerable variation in yield data from different plot sizes”
t0“rice yield”
Claim · model-written summary
Spatial yield patterns were observed for all plot sizes.
- Taxon
- riceOryza sativat0
- Outcome
- Spatial patterns in yieldse0
- Qualifier
- all plot sizese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Spatial patterns in yields from all plot sizes were observed”
t0“rice yield”
Claim · model-written summary
Four plot sizes showed random residual variability and were suitable for minimizing spatial variability in field experiments.
- Taxon
- riceOryza sativat0
- Outcome
- random variabilitye0
- Value
- 1 × 4, 3 × 4, 3 × 5, and 4 × 5 m2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plot sizes of 1 × 4, 3 × 4, 3 × 5, and 4 × 5 m2 had random variability and can be used in field experiments to minimize the effect of spatial variability on true treatment effects”
t0“rice yield”