00506nam a2200181 a 4500008004100000020001500041050001400056100002300070245004000093250001200133260004500145300002200190350000900212650002700221650001000248650002800258700003800286120416s1993    ||||||||||||||||| ||    u  a0195083288  aS 591 Tro  aTroeh, Frederick R10aSoils and soil fertility. (5th ed.)  a5th ed.  aNew York:bOxford University Pressc1993  avi, 462 p. : ill.  a0.00  aSOIL FERTILITY--ZAMBIA  aSOILS  aSOIL MANAGEMENT--ZAMBIA  aThompson, Louis M. (Louis Milton)