Nutrient Delivery Ratio- Table information

Hi forum. Recently, I am working with the Nutrient Delivery Ration model focuses on Tropical Dry Forest in Colombia (Latin America). However, I have had some problems in obtaining information regarding some LULC of natural forests, productive systems and grasses / shrubs for the variables:

-eff_n (and / or eff_p)

-crit_len_n (and / or crit_len_p)

If someone have information, articles or reference tables where I can find this information (especially for crit_len_n (and / or crit_len_p)), I'll be grateful.

Thank you for your cooperation,


Jorge Gualdrón

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