22 resultados para Epibiotic, field experiment


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Issued in cooperation with Iowa State University of Science and Technology, Agriculture and Home Economics Experiment Station, and the Center for Agricultural and Economic Development.

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"United States Department of Agriculture in cooperation with Alaska, Minnesota, Montana, North Dakota, and Texas Agricultural Experiment Stations."

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Saline Valley Farms was an experiment in cooperative farming and living begun in 1932 by Harold S. Gray.

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Saline Valley Farms was an experiment in cooperative farming and living begun in 1932 by Harold S. Gray.

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Saline Valley Farms was an experiment in cooperative farming and living begun in 1932 by Harold S. Gray.