Aihe-ehdotuksia
Aihe-ehdotuksia
Sols
Soils
1 533
Soil surveys
811
Études pédologiques
684
Soil conservation
313
Conservation
292
Agriculture
173
lisää ...
1
Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1962
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Hallinnon asiakirja
Kirja
2
Tekijä Lesh, F. R.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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Kirja
3
[Washington] : U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, 1950
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Hallinnon asiakirja
Kirja
4
5
Tekijä Read, Barry Steven
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Opinnäyte
Kirja
6
Tekijä Graham, Ian, 1953-
Chicago, Ill. : Heinemann Library, 2005
Chicago, Ill. : Heinemann Library, 2005
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Kirja
7
8
9
10
Grafton, WI : Blue Sky Associates, 1996
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Tuntematon
11
12
13
Washington : U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils and Agricultural Engineering, 1951
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Kirja
14
15
Tekijä Moran, W. J.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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Kirja
16
Tekijä Kubiëna, Walter Ludwig, 1897-
Ames, Ia., Collegiate Press 1938
Ames, Ia., Collegiate Press 1938
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Kirja
17
18
Tekijä Jury, William A., 1946-
Basel ; Boston : Birkhäuser Verlag, 1990
Basel ; Boston : Birkhäuser Verlag, 1990
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Kirja
19
Tekijä Arlidge, E. Z., Wong You Cheong, Y.
[Réduit] : Mauritius Sugar Industry Research Institute, 1975
[Réduit] : Mauritius Sugar Industry Research Institute, 1975
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Kirja
20
[Managua, Nicaragua] : Editorial Enlace, 1990
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Kirja