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  1. 81
    Erosion and Productivity of Soils Containing Rock Fragments.
    Published 1984
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  2. 82
    Soil Testing: Correlating and Interpreting the Analytical Results.
    Published 1977
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  3. 83
    Soil fertility management in agroecosystems /
    Published 2016
    Book
  4. 84
    Healthy soils are : covered all the time.
    Published 2013
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    Government Document eBook
  5. 85
    5 questions landowners should ask their farmers about soil health.
    Published 2015
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    Government Document eBook
  6. 86
    Use of cotton burs to improve productivity on irrigated land /
    by Walker, Harvey J., Box, John
    Published 1959
    Available online via OAK Trust Repository
    Government Document Book
  7. 87
    Amelioration technology for soil sustainability /
    Published 2019
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  8. 88
    Soli gloria Deo. Certaine rare and nevv inventions for the manuring and improving of all sorts of ground : Published by the author, for the helpe and instruction of all those that having any barraine land or other, and that are desirous to use the same unto their best profit and the publique good.
    by Shaw, John, inventor
    Published 1636
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  9. 89
    Briefe demonstrations of certaine, plaine and easie wayes, and meanes for the improving of any manner of barren-land : although not worth xij.d. the acre, and shewing how to make the same become worth xx.s. xxx.s. or xl.s. the acre yearely. Published for the benefit of the nation, and for the increasing of the wealth and prosperity of all nations, that shall in time practice the same. By J. S. One that is desirous of the publicke good.
    by Sha., J., 17th cent
    Published 1650
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  10. 90
    Stand dynamics of reference plots in the West Virginia long-term soil productivity studies /
    by Adams, Mary Beth, 1958-
    Published 2020
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    Government Document eBook
  11. 91
    The English improver, or, A new survey of husbandry : discovering to the kingdome that some land, both arrable and pasture, may be advanced double or treble, other land to a five or tenfold and some to a twentyfold improvement, yea some not now worth above one or two shillings per acree be made worth thirty or forty, if not more /
    by Blith, Walter, active 1649
    Published 1649
    Book
  12. 92
    Soil fertility management in agroecosystems /
    Published 2016
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  13. 93
    Bridging among disciplines by synthesizing soil and plant processes /
    Published 2018
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  14. 94
    Erosion and productivity of soils containing rock fragments : proceedings of a symposium /
    Published 1984
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  15. 95
    Sustaining soil fertility in West Africa.
    Published 2001
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