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This article in JEQ

  1. Vol. 40 No. 2, p. 287-291
    unlockOPEN ACCESS
     
    Received: Sept 14, 2010


    * Corresponding author(s): rmaguire@vt.edu
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doi:10.2134/jeq2010.0396

Novel Manure Management Technologies in No-Till and Forage Systems: Introduction to the Special Series

  1. Rory O. Maguire *a,
  2. Peter J. A. Kleinmanb and
  3. Douglas B. Beeglec
  1. a Dep. Crop and Soil Environmental Sciences, Virginia Tech, Blacksburg, VA 24061
    b USDA–ARS, University Park, PA 16802
    c Dep. Crop and Soil Sciences, Pennsylvania State Univ., University Park, PA 16802. Assigned to Associate Editor Tim Clough

Abstract

Surface application of manures leaves nitrogen (N) and phosphorus (P) susceptible to being lost in runoff, and N can also be lost to the atmosphere through ammonia (NH3) volatilization. Tillage immediately after surface application of manure moves manure nutrients under the soil surface, where they are less vulnerable to runoff and volatilization loss. Tillage, however, destroys soil structure, can lead to soil erosion, and is incompatible with forage and no-till systems. A variety of technologies are now available to place manure nutrients under the soil surface, but these are not widely used as surface broadcasting is cheap and long established as the standard method for land application of manure. This collection of papers includes agronomic, environmental, and economic assessments of subsurface manure application technologies, many of which clearly show benefits when compared with surface broadcasting. However, there remain significant gaps in our current knowledge, some related to the site-specific nature of technological performance, others related to the nascent and incomplete nature of the assessment process. Thus, while we know that we can improve land application of manure and the sustainability of farming systems with alternatives to surface broadcasting, many questions remain concerning which technologies work best for particular soils, manure types, and farming and cropping systems.

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Copyright © 2011. American Society of Agronomy, Crop Science Society of America, Soil Science SocietyAmerican Society of Agronomy, Crop Science Society of America, and Soil Science Society of America