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Published online 6 July 2006
Published in J Environ Qual 35:1548-1553 (2006)
DOI: 10.2134/jeq2005.0201
© 2006 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Long-Term Cropping System Effects on Carbon Sequestration in Eastern Oregon

Stephen Machado*, Karl Rhinhart and Steve Petrie

Oregon State University, Columbia Basin Agricultural Research Center, P.O. Box 370, Pendleton, OR 97801


Figure 1
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  		Fig. 1. Long-term effects of conventional tillage (CT) winter wheat–fallow (CTWF), grass pasture (GP), fertilized CT continuous winter wheat (CTWW), fertilized CT continuous spring wheat (CTSW), and fertilized CT continuous spring barley (CTSB) on soil organic carbon at the Columbia Basin Agricultural Research Center, Pendleton, Oregon.

 

Figure 2
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  		Fig. 2. Long-term effects of conventional tillage (CT) winter wheat–fallow (CTWF), grass pasture (GP), unfertilized CT continuous winter wheat (CTWW0N), unfertilized CT continuous spring wheat (CTSW0N), and unfertilized CT continuous spring barley (CTSB0N) on soil organic carbon at the Columbia Basin Agricultural Research Center, Pendleton, Oregon.

 

Figure 3
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  		Fig. 3. Long-term effects of conventional tillage (CT) winter wheat–fallow (CTWF), grass pasture (GP), fertilized no-tillage (NT) continuous winter wheat (NTWW), fertilized NT continuous spring wheat (NTSW), and fertilized NT continuous spring barley (NTSB) on soil organic carbon at the Columbia Basin Agricultural Research Center, Pendleton, Oregon.

 

Figure 4
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  		Fig. 4. Long-term effects of conventional tillage (CT) winter wheat–fallow (CTWF), grass pasture (GP), unfertilized no-tillage (NT) continuous winter wheat (NTWW0N), unfertilized NT continuous spring wheat (NTSW0N), and unfertilized NT continuous spring barley (NTSB0N) on soil organic carbon at the Columbia Basin Agricultural Research Center, Pendleton, Oregon.

 




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