Use of manure nutrients from concentrated animal feeding operations

Colleen M. Long, Rebecca Muenich, Margaret M. Kalcic, Donald Scavia

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Over the past few decades, there has been a nationwide trend away from small livestock farms and toward large Concentrated Animal Feeding Operations (CAFOs). This shift results in concentrated manure production and introduces potential problems associated with its disposal. We analyzed data from 13 permitted CAFOs in southeastern Michigan, including 1187 occurrences of manure application from 12 of the CAFOs with available field-level data. CAFOs applied excess manure nutrients to cropland by applying to fields with soil phosphorus test levels >50 ppm (42% of all cases), applying to soybeans (7% of all cases), over-estimating crop yields in calculating plant nutrient requirements (67% of all cases), and applying beyond what is allowed by state permits (26% of all cases). This represents significant potential for redistribution of manure nutrients. The total amount of manure from all instances of over-application could be redistributed to fertilize over 4775 ha (11,800 acres) per year. Significant barriers to redistribution of manure exist, however, including cost, land availability, crop and soil need, transport logistics, and farmers’ reluctance to use manure instead of inorganic fertilizer due to its variable composition. These findings are relevant to the harmful algal bloom and hypoxia issues in Lake Erie, which are driven by excess nutrients, and can be used to better inform science, modeling, and policy in the region.

Original languageEnglish (US)
Pages (from-to)245-252
Number of pages8
JournalJournal of Great Lakes Research
Volume44
Issue number2
DOIs
StatePublished - Apr 1 2018

Fingerprint

concentrated animal feeding operations
animal manures
manure
nutrient
animal
nutrients
nutrient excess
hypoxia
Lake Erie
crop yield
soybean
nutrient requirements
livestock
logistics
mineral fertilizers
algal blooms
algal bloom
soil
farm
phosphorus

Keywords

  • CAFO
  • Manure
  • Phosphorus
  • Waste management

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology

Cite this

Use of manure nutrients from concentrated animal feeding operations. / Long, Colleen M.; Muenich, Rebecca; Kalcic, Margaret M.; Scavia, Donald.

In: Journal of Great Lakes Research, Vol. 44, No. 2, 01.04.2018, p. 245-252.

Research output: Contribution to journalArticle

Long, Colleen M. ; Muenich, Rebecca ; Kalcic, Margaret M. ; Scavia, Donald. / Use of manure nutrients from concentrated animal feeding operations. In: Journal of Great Lakes Research. 2018 ; Vol. 44, No. 2. pp. 245-252.
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