Nothing
You may also choose from a list of confounders from Sigurdson (2008) to obtain the translocation frequency to be substracted from the observed yield, $X_{c}$.
Likewise, a value for the translocation frequency per cell, $TF$, can be provided manually.
Note that $X_{c} = TF \cdot N \cdot f$, where
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.