An official website of the United States government.

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

Multi-scale Investigation of Winter Runoff and Nutrient Loss Processes in Actively Managed Dairy Agroecosystems

Investigators
Vadas P A
Institutions
USDA - Agricultural Research Service
Start date
2013
End date
2015
Objective
Agricultural nutrient management is an important area of research and policy development due to water quality degradation by nitrogen (N) and phosphorus (P). Manure application to fields without incorporation is a significant source of N and P loss in runoff. Winter application of dairy manure, which is commonly practiced, is risky given frequent occurrence of runoff from snowmelt and rain-on-snow events. Many states restrict winter spreading of dairy manure, but little process-oriented research of winter runoff and manure nutrient loss has been conducted to support restrictions. Our project will investigate and improve the understanding and modeling of biochemical and physical processes controlling frozen-soil and snowmelt infiltration, runoff, and nutrient loss from soil and applied manure for actively managed dairy systems. Our objectives are to: i) conduct multi-scale experiments to investigate processes controlling winter runoff and nutrient loss from soil and manure; ii) develop novel model routines for winter manure runoff that can be incorporated into process-based, field and watershed-scale models; and iii) use runoff monitoring data to evaluate new model routines. Results will be novel because there is little to no process-level research of N and P loss in runoff from winter-applied dairy manure. Results will inform policy, guidelines, and prediction tools in northern-tier U.S. states where winter manure application is practiced. Better prediction tools that assess N and P loss from agroecosystems and evaluate if new practices and technologies can reduce that loss will help improve U.S. agricultural sustainability by enhancing environmental quality and agricultural economic viability.
Funding Source
Agricultural Research Service
Project source
View this project
Project number
5090-12630-003-09R
Accession number
424880
Categories
Sanitation and Quality Standards
Policy and Planning
Bacterial Pathogens