الموضوعات المستخلصة من بحثك.
الموضوعات المستخلصة من بحثك.
Sols
Soils
1,533
Soil surveys
811
Études pédologiques
684
Soil conservation
313
Conservation
292
Agriculture
173
المزيد ...
1
Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1962
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وثيقة رسمية
كتاب
2
بواسطة Lesh, F. R.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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كتاب
3
[Washington] : U.S. Dept. of Agriculture, Agricultural Research Administration, Bureau of Plant Industry, Soils, and Agricultural Engineering, 1950
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وثيقة رسمية
كتاب
4
5
بواسطة Read, Barry Steven
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أطروحة
كتاب
6
بواسطة Graham, Ian, 1953-
Chicago, Ill. : Heinemann Library, 2005
Chicago, Ill. : Heinemann Library, 2005
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كتاب
7
8
9
10
Grafton, WI : Blue Sky Associates, 1996
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غير معروف
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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كتاب
14
15
بواسطة Moran, W. J.
Bureau of Chemistry and Soils, 1933
Bureau of Chemistry and Soils, 1933
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كتاب
16
بواسطة Kubiëna, Walter Ludwig, 1897-
Ames, Ia., Collegiate Press 1938
Ames, Ia., Collegiate Press 1938
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كتاب
17
18
بواسطة Jury, William A., 1946-
Basel ; Boston : Birkhäuser Verlag, 1990
Basel ; Boston : Birkhäuser Verlag, 1990
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كتاب
19
بواسطة 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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كتاب
20
[Managua, Nicaragua] : Editorial Enlace, 1990
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كتاب