01914nam a2200349 a 450000100080000000500110000800800410001910000160006024500800007626002160015652008190037265000170119165000170120865000160122565000190124165000230126065000330128365000240131665000240134065000290136465300170139365300130141065300110142365300110143465300190144565300250146470000160148970000160150570000150152170000150153670000130155116682082017-05-11       1999    bl uuuu     u00u1 u    #d1 aLEHMANN, J.  aSingle-tree effects on soil P pools in a multi-strata agroforestry systems.  aIn: INTERNATIONAL SYMPOSIUM MULTI-STRATA AGROFORESTRY SYSTEMS WITH PERENNIAL CROPS, 1999, Turrialba. Multy-strata agroforestry systems with perennial crops: proceedings. Turrialba: CATIE, 1999. p. 120-123.c1999  aPresentation of the effects of different fruit and timber tree species in a multi-strata agroforestry systems in comparison to secondary vegetation and primary forest sites on inorganic and organic P pools of a Ferralsols in the Amazon basin. The S pools were also assessed, but could not be presented here due to the lenght of this contribution. Conclusion: The modified Hedley procedure proved to be extremely useful for the studied soil type to demonstrate the highly contrasting P dynamics of the experimental sites. The different tree species exhibited a pronuounced and relevant effect on P properties in the multi-strata agroforestry system. These strongly contrasting effects have to be considered when designing multi-strata agroforestry systems and may help to improve the efficiency of nutrient cycling.  aagroforestry  aforest trees  afruit trees  asoil fertility  aÁrvore Frutífera  aDesenvolvimento Sustentável  aEssência Florestal  aFertilidade do Solo  aFloresta Tropical Úmida  aAgrofloresta  aAmazonas  aBrasil  aManaus  aSustainability  aTropical rain forest1 aGUNTHER, D.1 aMOTA, S. da1 aKAISER, K.1 aTRETER, U.1 aZECH, W.