Adding a Trait

In general, a 'trait' is a phenotype; a characteristic that the plant exhibits. The traits that we are primariliy interested in collecting data for are listed in tab:traits.

Figure 8: When entering data, the citation is identified at the top of the page.
Image selectedcitation

Before adding trait data, it is necessary to have the citation, treatments, and site information already entered. If the correct citation is not identified at the top of the page fig:selected.citation. To add a new Trait, go to the http:ebi-forecast.igb.uiuc.edu/traits/newnew trait page: Trait $ \to$ new.

Presently, we are also using the Trait table record ecosystem level measurements other than Yield. Such ecosystem level measurements can include leaf area index or net primary productivity, but are only collected when required for a particular project.

fig:traits_new shows the web form for entering new trait data, and tab:traits provides a list of the traits that we are interested in collecting.

Most of the fields in the Traits table are also used in the Yields table. Here is a list of the fields with a brief description, followed by more thorough explanations:

Species*
Search for species in the database using the search box; if species is not found, see #_#>/DD>
Cultivar
primarily used for crops; If the cultivar being used is not found in drop-down box, see hyperref[sec:addcultivar]Section sec:addcultivar: Adding a Cultivar.
DateLOC
Date Level of confidence. See tab:dateloc for values.
Mean*
mean is in units of tons per hectare per year (t/ha)
Stat name
is name of the statistical method used (usually one of SE, SD, MSE, CI, LSD, HSD, MSD). See #f#>or more details.
Statistic
is the value of the statistic associated with Stat name.
N
Always record N if provided. N is the number of experimental replicates, often referred to as the sample size; N represents the number of independent units within each treatment: in a field setting, this is often the number of plots in each treatment, but in a greenhouse, growth chamber, or pot-study this may be the number of chambers, pots, or individual plants. Sometimes this value is not clearly stated.



Subsections
David 2011-10-07