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2by Miller, William PaulSubjects: “...Soils -- Copper content...”
Published 2020
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3by Jardine, Philip M.Subjects: “...Soils -- Aluminum content...”
Published 2015
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9by Morgan, Cecil GibsonSubjects: “...Soil formation -- Virginia...”
Published 2015
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10by Singh, Rabindar NathSubjects: “...Soils -- Phosphorus content...”
Published 2019
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11by Salomon, Milton“...In a large part of the soil fertility studies that have been attempted in the past, a great number...”
Published 2015
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13by Phillippe, Maurice MatthewSubjects: “...Soils -- Trace element content...”
Published 2015
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15by Cotton, Stuart BradySubjects: “...Soils -- Aluminum content...”
Published 2019
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16by Rich, Charles I.Subjects: “...Soil acidity -- Virginia -- Blacksburg...”
Published 2015
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17by DuShane, James Ross“..., conveyed by insect, bird, or mechanical agents, or by the bacillus working back from infected twigs, fruit...”
Published 2015
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