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Published online 2 February 2006
Published in Soil Sci Soc Am J 70:311-326 (2006)
DOI: 10.2136/sssaj2005.0207
© 2006 Soil Science Society of America
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Trans-Disciplinary Soil Physics Research Critical to Synthesis and Modeling of Agricultural Systems

Lajpat R. Ahujaa,*, Liwang Maa and Dennis J. Timlinb

a USDA-ARS, Great Plains Systems Research Unit, Fort Collins, CO 80526, USA
b USDA-ARS, Crop Systems and Global Change Lab., Beltsville, MD 20705


Figure 1
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  		Fig. 1. Complex nature of an agriculture system, illustrated by the C-N cycle. Also see Fig. 3.

 

Figure 2
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  		Fig. 2. The desirable continual two-way interactions among the field research, conceptual and process models of agricultural systems, and the simplified management decision support systems.

 

Figure 3
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  		Fig. 3. The central role of soil water in agricultural systems.

 




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