Circular of Information, Issues 330-342 |
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Agriculture American amount animals areas bacteria become beekeepers bees better body brown bushels calcium called carried clover colony color combs coming condition conservation contain continued corn cropping system developed disease effective elements erosion EXPERIMENT fall farm farmer feed fertility fields fleas followed foulbrood give grain grass greatly green manure ground grow grown growth important increase interesting keep land leaves legume crops less lime living look loss material matter and nitrogen means method MICHIGAN milk mineral Missouri mixed necessary oats organic matter particles pasteurization phosphorus plant food plowed pollen possible potassium practices prepared preventive production proper protein rainfall rains removed roots running slopes soil soil fertility spring sulfathiazole supply sweet clover teeth temperature texture things ticks topsoil treated treatment turned usually washed winter yields