The 2023 Nutrient Management Calendars are now available from the Nebraska Extension. This easy-to-use record keeping calendar tracks manure-related records for livestock and cropping operations. It serves as a guide for livestock operations that are required by the State of Nebraska to keep records. It was designed to be used by all sizes of livestock operations and includes all records required for operations permitted for the National Pollutant Discharge Elimination System (NPDES).