01964nam a2200229 a 450000100080000000500110000800800410001910000210006024500830008126000160016430000110018050000730019152013480026465000150161265000150162765000130164265000160165565300140167165300170168565300150170265300170171712399682010-09-22       1994    bl uuuu  m   00u1 u    #d1 aNUERNBERG, N. J.  aMovement of surface applied phosphorus fertilizer in a southeastern acid soil.  a1994.c1994  a140 p.  aDissertation (Doctor of Philosophy) - University of Georgia, Athens.  aNot much is known about the extent of the movement of P fertilizer applied on established alfafa stands in the southeastern USA acid soils.  Increasing the avilable P in deeper horizons where plant available water is less limiting during drought spells would be of great interest.  Thus, in order to evaluate the extent of the movement of phosphorus in acid soil, a series of field, greenhouse and laboratory experimentswere carried out.  Phosphorus and other chemical and physical properties were evaluated for different soil dephts.  In addition, a new anion-exchange resin in membrane (AEM) was investigated for extracting available P.  The AEM was effective in extracting P, not dependent on soilmineralogy and easily adaptable for a routine use.  under field con-ditions, three P rates (0,100 and 200 kg HA-1) were applied on three  established alfafa entries (Acid tolerant, Acid sensitive and Apollo).  One year after P application, most of the P  fertilizer was located in the upper 5 cm layer.  However, appreciable amounts of P moved down from the top to the bottom of the plow layer (approximately 16 cm) inproportion to the amount of P fertilizer applied.  Below the plow layer, no significant increase in available P was observed.  Alfafa entries did not affect the P movement.  the effect of earthworms (populations formed by ...  aphosphorus  aAdubação  aFósforo  aSolo Ácido  aAcid soil  aFertilizacao  aFertilizer  aSolos acidos