Search Results - Smith, Keith A. 1940-

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  1. 1
    Nitrogen efficiency in agricultural soils proceedings of the ...

    Nitrogen efficiency in agricultural soils proceedings of the ...

    Published 1988
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  2. 2
    Soil and environmental analysis modern instrumental techniques

    Soil and environmental analysis modern instrumental techniques

    Published 2004
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  3. 3
    Soil and environmental analysis physical methods

    Soil and environmental analysis physical methods

    Published 2001
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