Summary:

## Agricultural Fires

The burned area of cropland (A_b) is calculated using the equation:

A_b = a_1 * f_se * f_t * f_crop * A_g

Where:
- a_1 is a constant (1.6x10^-4 hr^-1) estimated using an inverse method
- f_se represents the socioeconomic effect on fires
- f_t determines the seasonality of agricultural fires
- f_crop is the fractional coverage of cropland
- A_g is the total cropland area

The socioeconomic factor f_se is given by:
f_se = f_d * f_e
Where f_d is the effect of population density and f_e is the effect of GDP.

The seasonality factor f_t is set to 1 during the climatological peak month for agricultural fires and 0 otherwise, based on the dataset from van der Werf et al. (2010).

The fire impact in the post-fire region is parameterized similarly to the general fire impact, but with combustion completeness factors and tissue mortality factors specific to crop PFTs.