Integrating sheep grazing into wheat–fallow systems: Crop yield and soil properties

dc.contributor.author Lenssen, Andrew
dc.contributor.author Sainju, Upendra
dc.contributor.author Lenssen, Andrew
dc.contributor.author Hatfield, Patrick
dc.contributor.department Agronomy
dc.date 2018-02-13T20:15:44.000
dc.date.accessioned 2020-06-29T23:03:15Z
dc.date.available 2020-06-29T23:03:15Z
dc.date.embargo 2014-02-03
dc.date.issued 2013-05-01
dc.description.abstract <p>The two predominant systems for weed management in summer fallow are tillage with a field cultivator or multiple applications of broad spectrum herbicides with zero tillage. Both systems are based on substantial use of off farm resources. Our objective was to determine if strategic grazing of sheep may allow grain growers to more sustainably manage crop residues, volunteer crop, and other weeds during fallow periods. We conducted a study near Bozeman, Montana, USA, comparing three fallow weed management systems in two crop rotations from 2005 to 2008. Fallow weed management systems were conventional tillage, chemical-fallow (herbicide application), and sheep grazing. The crop rotations were summer fallow–spring wheat and summer fallow–winter wheat. In late fall, chemical-fallow treatment had greater residue cover and soil water content than did tilled- or grazed-fallow. At 0–15-cm depth, soil had lower bulk density in chemical- and tilled-fallow than in grazed fallow. Similarly, soil NO<sub>3</sub>-N, Ca, SO<sub>4</sub>-S concentrations and EC were lower following grazed-fallow than tilled-fallow, but Na concentration was higher following grazed-fallow than tilled- or chemical-fallow. Following spring and winter wheat, soil properties were not influenced by treatments. Grain yield was greater in winter wheat than in spring wheat but the trend reversed in protein concentration. Although soil properties varied among treatments, fallow management system had little influence on yield or quality of spring and winter wheat. Sheep grazing during fallow periods had limited impact on subsequent wheat yield and quality, and is a suitable practice for weed and residue management in wheat–fallow systems.</p>
dc.description.comments <p>This article is from <em>Field Crops Research</em> 146 (2013): 75–85, doi:<a href="http://dx.doi.org/10.1016/j.fcr.2013.03.010" id="x-ddDoi" target="_blank">10.1016/j.fcr.2013.03.010</a>.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/agron_pubs/19/
dc.identifier.articleid 1020
dc.identifier.contextkey 5058694
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath agron_pubs/19
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/4521
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/agron_pubs/19/2013_LenssenAW_IntegratingSheepGrazing.pdf|||Fri Jan 14 21:48:50 UTC 2022
dc.source.uri 10.1016/j.fcr.2013.03.010
dc.subject.disciplines Agricultural Science
dc.subject.disciplines Agriculture
dc.subject.disciplines Agronomy and Crop Sciences
dc.subject.disciplines Animal Sciences
dc.subject.keywords Cropping systems
dc.subject.keywords Semiarid
dc.subject.keywords Northern Great Plains
dc.subject.keywords Tilled summer fallow
dc.subject.keywords Chemical fallow
dc.subject.keywords Grazed summer fallow
dc.subject.keywords Spring wheat
dc.subject.keywords Winter wheat
dc.subject.keywords Sheep
dc.subject.keywords Integrated livestock and grain farming systems
dc.title Integrating sheep grazing into wheat–fallow systems: Crop yield and soil properties
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 7f67ca95-722b-4dfd-8f49-56ff95980240
relation.isOrgUnitOfPublication fdd5c06c-bdbe-469c-a38e-51e664fece7a
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