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The soil color : proceedings of a symposium sponsored by Division S-5 and S-9 of the Soil Science Society of America in San Antonio, Texas, 21-26 Oct. 1990 /

Madison, WI : Soil Science Society of America, 1993 0-89118-802-9

Soil testing : sampling, correlation, calibration, and interpretation /

Madison, WI : Soil Science Society of America, 1987 , 3a. reimpresión 1990. 0-89118-784-7

Soil survey techniques : proceedings of a symposium ..Soil Science Society of America, 4 Dec.1985,Chicago,Il. /

By Reybold, William Umstd.
Madison, WI : Soil Science Society of America, 1987 0-89118-783-9

Mineral classification of soils.

By Kittrick, J. A..
Madison, WI : Soil Science Society of America : | American Society of Agronomy, 1985 , Proceedings of a symposium ..Atlanta, GA 30 Nov.1981 .. 0-89118-777-4

Field measurement of dinitrogen fixation and denitrification /

Madison, WI : Soil Science Society of America, 1986 , Proceedings of a symposium .. 15 Aug.,1983. 0-89118-780-4

Land use planning techniques and policies : proceedings of a symposium .. .

Atlanta, GA : Soil Science Society of America : | American Society of Agronomy, 1984 0-89118-772-3

Universal soil loss equation : past, present, and future /

Madison, WI : Soil Science Society of America, 1979 0-89118-766-9