# op\_typ | 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 | | kill | Kill | This operation kills the plant and converts the 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 | --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://swatplus.gitbook.io/io-docs/introduction-1/landuse-and-management/management.sch/op_typ.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.