00590naa a2200193 a 450000100080000000500110000800800410001910000140006024501440007426000090021865000130022765000140024065000160025465000140027065300200028470000210030470000230032577300480034816034101995-06-27       1980    bl ---       0--  u    #d1 aPENNY, A.  aAn experiment begun in 1958 measuring effects of N, P and K fertilizers on yield and N, P and K contents of grass. 1-Effects during 1964-7.  c1980  aFósforo  aGramínea  aNitrogênio  aPotássio  aAGRONOMIA GERAL1 aWIDDOWSOW, F. V.1 aWILLIAMS, R. J. B.  tJ. Agric. Sci.gv.95, n.3, p.575-582, 1980.