The Weed model - calculate change for one year
weed.update(d, S, SSBa, DSBa, Soil, Crop, Herb, param): weed density at seed emergence (plants/m2) - value for year
: seed production per m2 - value for year
: surface seedbank after tillage (grains/m2) - value for year
: deep seedbank after tillage (grains/m2) - value for year
: value for soil decision (1 or 0)
: value for crop decision (1 or 0)
: value for herbicide treatment decision (1 or 0)
: vector of the 16 parameters
a vector with values of state variables for year+1