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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Schoth, H. A. (Harry August), - Hein, M. A. (Mason August),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1940]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  Climatic factors  Forage crops  Forage plants  Hay  Internet resource  lawns and turf  Lolium  Lolium multiflorum  Lolium perenne  Pasture plants  Ryegrasses  seed crop production  sowing  Varieties  
  1. By: Rubenstein, Jesse - Hulme, Philip - Rolston, M. Philip - Stewart, Alan - Hampton, John
    Type: Article
    In: NeoBiota
    Volume: 85
    Date: 2023
    Page Range: 167--195
    Publication Info: Pensoft Publishers 2023
    Subjects: Analytical purity  Herbicides  Lolium perenne  perennial ryegrass  seed lots  Trifolium repens  weed seeds  White clover