00434naa a2200145 a 450000100080000000500110000800800410001910000180006024501190007826000090019765300090020670000180021570000180023377300370025120426232016-04-05       1954    bl ---       0--  u    #d1 aBURTON, G. W.  aRoot penetration distribution and activity in Southern grasses measured by yiels, drought symptoms and P32 uptake.  c1954  aRoot1 aDEVANE, E. H.1 aCARTER, R. L.  tAgron. J.gv.46, p.229-33, 1954.