how to calculate Soil organic carbon density according 4 bulk density parameters?

[Rain Xia]

Dear prof Niels Batjes,

    Thanks for your share to how to use snapshot data and latest data by R. It had provided great help for me. Thank you!

    This time i have a question about how to use 4 Bulk density parameters (bdfi33, bdfiov, bdws33, bdwsov) to calaculate SOC density(kg C/m2). The classic formula I have learned from books to carculate SOC density per layer is (1- cfvo) * bdwsov * orgc * depth. but the next 3 bulk density parameters (bdfi33, bdfiov, bdws33) i dont know how to use.  In my opinion,  I think maybe be this 3 formula:

1) SOC density per layer for "bdfiov" = bdfiov * orgc * depth ; 

2) SOC density per layer for "bdfi33" = bdfi33 * orgc * depth *  (1 - wg0033)

3) SOC density per layer for "bdws33" = bdws33 * orgc * depth * (1 - wg0033) * (1- cfvo)

    I can not make sure my thought is right, can you give me some suggestion or some guidance?

    Thank you!

     Xia

[Niels Batjes]

For this use: bdfiod, orgc, cfvo and depth of layer.

Op woensdag 13 januari 2021 om 08:30:38 UTC+1 schreef xiaan...@mails.ucas.ac.cn: