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  1. By: DeJong, D. - Fleming, M. - Iwig, William C - Perry, C.R.
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: Apples  branches  crop yield  estimation  probability analysis  Sampling  Size  Washington  
  2. By: McKee, Roland, - Enlow, C. R. (Charles Ranger),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1931
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  chemical composition  crop production  crop yield  crop-weed competition  Crotalaria incana  Crotalaria juncea  Crotalaria pallida  Crotalaria spectabilis  descriptions  feed quality  Forage crops  forage quality  green manures  Harvesting  Insect pests  Internet resource  Legumes  ornamental value  plant diseases and disorders  plant pathogens  Plant physiology  Poisonous plants  seed crop production  seed storage  sowing  Sunn hemp  
  3. By: Evans, Morgan W. (Morgan William),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, [1933]
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  crop yield  Forage plants  Hay  Internet resource  Phleum pratense  seed crop production  Timothy-grass  Varieties  variety trials  
  4. By: Robinson, Brittain B. (Brittain Bragunier),
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1940
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  crop yield  economic outlook and situation  Fiber plants  Harvesting  Internet resource  Natural history  plant characteristics  plant cultural practices  Plant fibers  processing technology  Ramie  
  5. By: Weir, Wilbert Walter,
    Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1926
    Holding Institution: U.S. Department of Agriculture, National Agricultural Library
    Subjects: AgSpace  crop production  Crop rotation  crop yield  experiment stations  Fertilizers  Internet resource  land management  long term experiments  research methods  Rothamsted  Soil management  Soil productivity  Yields