op_typ

Type of management operation

Code	Operation	Description
pcom	Plant community	This operation initializes the plant community in the HRU
plnt	Planting/beginning of growing season	This operation initializes the growth of a specific land cover/plant type in the HRU
harv	Harvest	This operation harvests the portion of the plant designated as yield and removes the yield from the HRU, but allows the plant to continue to grow (e.g. hay cuttings)
hvkl	Harvest and kill	This operation harvests the portion of the plant designated as yield, removes the yield from the HRU and converts the remaining plant biomass to residue on the soil surface
till	Tillage	This operation mixes the upper soil layers and redistributes the nutrients/chemicals within those layers
irrm	Scheduled irrigation	This operation applies water to the HRU on the specified day
fert	Fertilizer application	This operation adds nutrients to the soil in the specified day
pest	Pesticide application	This operation applies a pesticide to the plant and/or soil on the specified day
graz	Grazing	This operation removes plant biomass at a specified rate and allows simultaneous application of manure
burn	Burning	This operation records the biomass, residue and phosphorus that is burned
swep	Street sweeping	This operation removes sediment and nutrient build-up on impervious areas in the HRU; can only be used when the urban build-up/wash-off routines are activated for the HRU
skip	Skipping	This operation skips to the end of the year