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1by Free, Edward ElwaySubjects: “...Soils Nitrate content Amargosa River Valley (Nev. and Calif.)...”
Published 1912
Government Document Book -
2Published 1992Subjects: “...Soils Nitrate content Measurement Congresses....”
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3Evaluation of soil nitrate tests for predicting corn nitrogen response in the North Central Region /by Bundy, Larry GeneSubjects: “...Soils Nitrate content Middle West Measurement....”
Published 1999
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4Subjects: “...Soils Nitrate content California San Bernardino County....”
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