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Roller-Crimper Termination for Legume Cover Crops in North Carolina: Impacts on Nutrient Availability to a Succeeding Corn Crop.

Authors :
Parr, Mary
Grossman, Julie M.
Reberg-Horton, S. Chris
Brinton, Carrie
Crozier, Carl
Source :
Communications in Soil Science & Plant Analysis. Apr2014, Vol. 45 Issue 8, p1106-1119. 14p.
Publication Year :
2014

Abstract

Nitrogen (N) release from roll-killed legume cover crops was determined for hairy vetch (Vicia villosa Roth), crimson clover (Trifolium incarnatumL.), and a hairy vetch + rye (Secale cerealeL.) biculture in an organic corn production system in North Carolina, USA. Cover crops were planted at two locations in fall 2008 and 2009, roll-killed in May, and no-till planted with corn (Zea maysL.). Inorganic soil N and mineral N flux were determined using potassium chloride (KCl) extractions and ion-exchange resin (Plant Root Simulator, PRS) probes at 2-week intervals for 12 weeks and compared to fertilized controls of 0 and 168 kg N ha−1. In 2009, greater plant available N under hairy vetch than under either 0 N control or crimson clover was found, with peak soil N occurring between 4 and 6 weeks after roll kill. Available soil N under crimson clover mulches was less than or equal to 0 N, suggesting net immobilization. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
00103624
Volume :
45
Issue :
8
Database :
Academic Search Index
Journal :
Communications in Soil Science & Plant Analysis
Publication Type :
Academic Journal
Accession number :
95713148
Full Text :
https://doi.org/10.1080/00103624.2013.867061