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  1. 1
    Availability of phosphate fertilizer materials in calcareous soils in Colorado /

    Availability of phosphate fertilizer materials in calcareous soils in Colorado /

    Published 1955
    Government Document Book
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  2. 2
    Soil moisture and yield of winter wheat in eastern Colorado /

    Soil moisture and yield of winter wheat in eastern Colorado / by Brengle, K. G.

    Published 1960
    Government Document Book
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  3. 3
    Comparison of methods for estimating available phosphorus in alkaline calcareous soils /

    Comparison of methods for estimating available phosphorus in alkaline calcareous soils / by Hockensmith, R. D. (Roy Douglas), 1905-1981

    Published 1933
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  4. 4
    Slick spots in western Colorado soils

    Slick spots in western Colorado soils by Gardner, Robert Alexander

    Published 1937
    Online Access
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  5. 5
    Nitric nitrogen in the soils of the Arkansas valley

    Nitric nitrogen in the soils of the Arkansas valley by Gardner, Robert Alexander

    Published 1934
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  6. 6
    The use of electrodialysis for estimating phosphate availability in calcareous soils

    The use of electrodialysis for estimating phosphate availability in calcareous soils by Goodwin, James B. (James Bennett), 1910-

    Published 1935
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  7. 7
    The use of sugar beet petioles as indicators of soil fertility needs

    The use of sugar beet petioles as indicators of soil fertility needs by Gardner, Robert Alexander

    Published 1935
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  8. 8
    Utilization of phosphorus by various crops as affected by source of material and placement /

    Utilization of phosphorus by various crops as affected by source of material and placement /

    Published 1950
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  9. 9
    Slick spots in western Colorado soils /

    Slick spots in western Colorado soils / by Gardner, Robert

    Published 1937
    Government Document Book
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  10. 10
    The nitrogen requirement of sugar beets /

    The nitrogen requirement of sugar beets / by Gardner, Robert

    Published 1942
    Government Document Book
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  11. 11
    Nitric nitrogen in the soils of the Arkansas valley /

    Nitric nitrogen in the soils of the Arkansas valley / by Gardner, Robert

    Published 1934
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    Government Document Book
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  12. 12
    The use of electrodialysis for estimating phosphate availability in calcareous soils /

    The use of electrodialysis for estimating phosphate availability in calcareous soils / by Goodwin, James B. (James Bennett), 1910-

    Published 1935
    Search for the full-text version of this title in HathiTrust
    Government Document Book
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  13. 13
    The use of sugar beet petioles as indicators of soil fertility needs /

    The use of sugar beet petioles as indicators of soil fertility needs / by Gardner, Robert

    Published 1935
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  14. 14
    Color photography in soil studies /

    Color photography in soil studies / by Brown, L. A. (Lindsey Andrew), 1906-

    Published 1939
    Government Document Book
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