> For the complete documentation index, see [llms.txt](https://swatplus.gitbook.io/io-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://swatplus.gitbook.io/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/databases/plants.plt/bm_e_hi.md).

# bm\_e\_hi

Biomass-energy ratio corresponding to the 2nd point on the radiation use efficiency curve

The 1st point on the radiation use efficiency curve is comprised of the ambient CO2 concentration, 330 μL CO2/L air, and the biomass-energy ratio reported for [bm\_e](/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/databases/plants.plt/untitled-17.md).

Please read the explanation for parameters [co2\_hi](/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/databases/plants.plt/co2_hi.md) and [bm\_e](/io-docs/~/changes/GiVD5ID0WVyRIAumaMy2/introduction/databases/plants.plt/untitled-17.md) to obtain additional information about this parameter and methods used to measure it.