00762naa a2200193 a 450000100080000000500110000800800410001910000190006024500940007926000090017352002370018265000150041965000130043465000090044765300170045670000180047370000250049177300520051616784612015-01-29       1999    bl uuuu     u00u1 u    #d1 aKASS, D. C. L.  aSoil phosphorus fractions in agroforestry systemsbeffect of soil dept and sampling time.  c1999  aThe principal aim of this study was to determine if different depths and times of sampling could affect the distribution of inorganic and organic P in a soil in which different agroforesty practices had been carried on for 13 years.  aAmostragem  aFósforo  aSolo  aAgrofloresta1 aSOMARRIBA, E.1 aMACÊDO, J. L. V. de  tAgroforestry Forumgv. 9, n. 4, p. 42-49, 1999.