deletions | additions       diff --git a/Adding Traits and Yields.md b/Adding Traits and Yields.md  index 99c5849..5957b6d 100644  --- a/Adding Traits and Yields.md  +++ b/Adding Traits and Yields.md 
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if MSE is available. Only if there is no other information available should you  record the P-value.  # Adding [Adding  a Yield  [Form for adding a new yield record](http://www.betydb.org/yields/new) Yield](http://www.betydb.org/yields/new)  The protocol for entering yield data is identical to entering data for a  trait, with a few exceptions: 
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# Adding a Covariate  [Form for entering a new covariate](http:www.betydb.org/covariates/new) [Covariate](http:www.betydb.org/covariates/new)  Covariates are required for many of the traits. Covariates generally  indicate the environmental conditions under which a measurement was