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21.
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Introducción a la microbiología del suelo by Burges, A. Material type:  Text Language: Spanish Publisher: Zaragoza : Acribia, 1960Availability: Items available for loan: Biblioteca Central UNNECall number: 631.46 B955 i ej.1 (1).
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22.
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Suelos agrícolas : su conservación y fertilización by Worthen, Edmund L. Material type: Text Language: Spanish Publisher: México : Unión Tipográfica Editorial Hispano Americana, 1949Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 W932 s ej.1 (1).
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23.
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The fertility of the land by Roberts, Isaac Phillips. Edition: 13a ed.Material type: Text Language: en Publisher: New York : The Macmillan Company, 1913Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 R643 f 13 ej.1 (1).
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24.
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Soil conservation by Kohnke, Helmut. Material type: Text Language: en Publisher: New York : McGraw-Hill, 1959Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 K79 s ej.1 (1).
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25.
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Ernterückstände und wurzelbild by Kohnlein, Johannes. Material type: Text Language: de Publisher: Berlin : P. Parey, 1953Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 K79 e ej.1 (1).
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26.
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Soil and water conservation engineering by Frevert, Richard K | Schwab, Glenn O | Edminster, Talcott W. Material type: Text Language: en Publisher: New York : J. Wiley, 1955Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 F891 s ej.1 (1).
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27.
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28.
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Conservación del suelo y del agua by Argentina. Ministerio de Agricultura y Ganadería de la Nación. Material type: Text Language: Spanish Publisher: Buenos Aires : Buenos Aires. Ministerio de Agricultura y Ganadería. Dirección General de Investigaciones Agrícolas. Institutos de Suelos y Agrotecnia, c1956Availability: Items available for loan: Biblioteca Central UNNECall number: 631.45 A691 co ej.1 (1).
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29.
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The physical properties of soils by McCall, Arthur G. Material type: Text Language: en Publisher: New York : Orange Judd Company, 1971Availability: Items available for loan: Biblioteca Central UNNECall number: 631.43 M122 p ej.1 (1).
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30.
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Física de suelos : principios y aplicaciones by Gavande, Sampat A. Material type: Text Language: Spanish Publisher: México : Centro Regional de Ayuda Técnica, 1972Availability: Items available for loan: Biblioteca Central UNNECall number: 631.43 G279 ej.1 (1).
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31.
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Coloquio de tecnología de suelos by Coloquio de tecnología de suelos (2°: 1971 octubre 19-20 : Resistencia). Material type: Text Language: Spanish Publisher: Resistencia : Universidad Nacional del Nordeste, 1971Availability: Items available for loan: Biblioteca Central UNNECall number: 631.42 C718 ej.2 (1).
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32.
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La política de irrigación en México by Orive Alba, Adolfo, 1907. Material type: Text Language: Spanish Publisher: México : Fondo de Cultura Económica, c1960Availability: Items available for loan: Biblioteca Central UNNECall number: 631.6(72) O69 ej.1 (1).
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33.
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34.
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El agua en el suelo by Tschapek, Marcos W. Material type: Text Language: Spanish Publisher: Buenos Aires : Instituto Nacional de Tecnología Agropecuaria, 1959Availability: Items available for loan: Biblioteca Central UNNECall number: 631.6 T877 a ej.1 (1).
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35.
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Fundamentals of ecology by Odum, Eugene P | Odum, Howard T. Edition: 2a ed.Material type: Text Language: en Publisher: London : W. B. Saunders Company, c1959Availability: Items available for loan: Biblioteca Central UNNECall number: 631.95 O22 ej.1 (1).
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36.
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Ecología agrícola práctica by Mclean, Robert Colquhoun, 1890. Material type: Text Language: Spanish Publisher: Zaragoza : Acribia, 1963Availability: Items available for loan: Biblioteca Central UNNECall number: 631.95 M163 ej.1 (1).
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37.
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The ecology of invasions by animals and plants by Elton, Charles Sutherland, 1900. Material type: Text Language: Spanish Publisher: London : Methuen, c1958Availability: Items available for loan: Biblioteca Central UNNECall number: 631.95 E51 e ej.1 (1).
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38.
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Elementos de ecología by Clarke, George L. Material type: Text Language: Spanish Publisher: Barcelona : Omega, c1958Availability: Items available for loan: Biblioteca Central UNNECall number: 631.95 C598 ej.2 (1).
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39.
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Ecología agraria by Azzi, Girolamo. Material type: Text Language: Spanish Publisher: Barcelona : Salvat, 1959Availability: Items available for loan: Biblioteca Central UNNECall number: 631.95 A999 e ej.1 (1).
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40.
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Quantitative plant ecology by Smith, P. Greig. Material type: Text Language: en Publisher: London : Butter worths scientific, 1957Availability: Items available for loan: Biblioteca Central UNNECall number: 631.92 S648 q ej.1 (1).
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