Sanchez, Pedro A. 1940- creator text New York Wiley c1976 monographic x, 618 p. : ill. ; 24 cm. Pedro A. Sanchez. "A Wiley-Interscience publication." Includes bibliographies and index. Soils Tropics Plant-soil relationships Tropics Soil science Agriculture Tropics S599.T7 .S2 1976 631.4/913 0471752002 76022761 UOEL 000 20250429101951.0 2234154