University of Minnesota Agricultural Experiment Station2012-05-032012-05-031974https://hdl.handle.net/11299/12325716 pagesInterview with the Director, AnimalManure-fertilizerorpollutant?, Electron Microscope Opens Submicroscopic World, Winter Survival of Dwarf Apple Rootstocks, In agriculture: Energy Dictates "New Research Dimension", Use Fertilizer WiselyJournalMinnesota Science, Vol. 30, No. 1