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Related Concept Videos

What is Conservation Biology?01:57

What is Conservation Biology?

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Related Experiment Video

Updated: Nov 15, 2025

How to Create Conditioned Taste Aversion for Grazing Ground Covers in Woody Crops with Small Ruminants
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Conservation management practices reduce non-point source pollution from grazed pastures.

Amanda J Ashworth1, Philip A Moore1, Dan H Pote2

  • 1USDA-ARS, Poultry Production and Product Safety Research Unit, 1260 W. Maple Dr. Fayetteville, AR 72701, USA.

Heliyon
|March 4, 2021
PubMed
Summary
This summary is machine-generated.

Conservation practices like pasture aeration and subsurface litter incorporation significantly reduce nutrient runoff from poultry litter. Subsurface incorporation showed the greatest reduction in nitrogen and phosphorus pollution.

Keywords:
Best management practicesGrazing systemsNitrogenNutrient loadsPhosphorusPoultry litter

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Area of Science:

  • Environmental Science
  • Soil Science
  • Agricultural Science

Background:

  • Poultry litter is a valuable resource but requires sustainable management to prevent nutrient pollution.
  • Nutrient runoff from agricultural lands impacts water quality and ecosystem health.
  • Producers need effective practices to manage poultry litter economically and environmentally.

Purpose of the Study:

  • To evaluate the effectiveness of pasture aeration and subsurface litter incorporation in reducing nutrient runoff.
  • To compare these conservation practices against surface litter application in small watersheds.
  • To assess the impact on nitrate-nitrogen, total nitrogen, soluble reactive phosphorus, and total phosphorus loads.

Main Methods:

  • Utilized small watersheds (0.23 ha each) with three treatments: pasture aeration, subsurface litter incorporation, and surface litter application.
  • Applied poultry litter annually to each watershed from 2007-2012.
  • Monitored nutrient loads (NO3-N, TN, SRP, TP) in runoff over a 4-year period.

Main Results:

  • Both pasture aeration and subsurface litter incorporation significantly reduced nutrient loads compared to surface application (P ≤ 0.05).
  • Subsurface incorporation reduced NO3-N, TN, SRP, and TP loads by 78%, 72%, 55%, and 59%, respectively.
  • Pasture aeration reduced NO3-N, TN, SRP, and TP loads by 49%, 42%, 28%, and 35%, respectively.

Conclusions:

  • Subsurface incorporation of poultry litter and pasture aeration are effective conservation practices for mitigating non-point source pollution.
  • These methods significantly decrease nutrient (nitrogen and phosphorus) runoff in agricultural watersheds.
  • Further research is needed on the efficacy under rainfed conditions and economic feasibility.