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Manejo-Ecologico-del-Suelo

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ANA PRIMAVESI

Fazenda Ecológica

Caixa Postal 36

18730 - ltai - São Paulo

Brasil






Ana Primavesi

lngeniera agrónoma.

Fundadora y directora dei Laboratorio

de Química dei Suelo (Universidad Federal

de Santa Maria, Rio Grande do Sul)

MANEJO

ECOLOGICO

DEL SUELO

La agricultura

en regionas tropicales

QUINTA EDICION

AL CUIDADO DEL ING. AGRON. JORGE S. MOLINA

LIBRERIA "EL ATENEO" EDITORIAL 6

BUENOS AIRES· LIMA • RIO OE JANEIRO • CARACAS

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MEXICO ·BARCELONA· MADRID· BOGOTA ;;;;;;;;;;..



































































































































































































































































































































































































































































































































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