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Summary: Spring-water Nitrate Increased with
Removal of Livestock Grazing in a
California Oak Savanna
Randall D. Jackson,1
* Barbara Allen-Diaz,2
Lawrence G. Oates,2
and Kenneth W. Tate3
1
Department of Agronomy, University of Wisconsin-Madison, 1575 Linden Drive, Madison, Wisconsin 53706-1597, USA
2
Ecosystem Sciences, University of California, Berkeley, 151 Hilgard Hall, Berkeley, California 94720-3110, USA; 3
Department of
Agronomy and Range Science, University of California, Davis, One Shields Ave, Davis, California 95616, USA
ABSTRACT
We characterized spatial and temporal changes in
nitrate concentrations of the leachate from annual
grasslands and subsequently emergent spring-wa-
ters and tested the effect of livestock grazing re-
moval on them. Nitrate patterns indicated that
annual grassland soils are a likely N source to
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