8 resultados para PH REGULATION

em Iowa Publications Online (IPO) - State Library, State of Iowa (Iowa), United States


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Agency Performance Report from the Professional Licensing and Regulation Division

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This book, published jointly by the American Society of Agronomy, Soil Science Society of American and Iowa State University presents the papers that were given at a symposium held in Ames, Iowa, on Nov. 30 and Dec. 1, 1965 on the general topic of plant environment and efficient water use.